diff --git a/README.md b/README.md
index 3395f8be5..c622a2961 100644
--- a/README.md
+++ b/README.md
@@ -69,6 +69,7 @@ Additional recipes for configuring and deploying the server can be found at [sol
 | `--loggingLevel, -l` | `"info"`| |
 | `--rootFilePath, -f` | `"./"` | Folder to start the server in when using a file-based config. |
 | `--sparqlEndpoint, -s` | | Endpoint to call when using a SPARQL-based config. |
+| `--showStackTrace, -t` | false | Whether error stack traces should be shown in responses. |
 | `--podConfigJson` | `"./pod-config.json"` | JSON file to store pod configuration when using a dynamic config. |
 | `--idpTemplateFolder` | `"templates/idp"` | Folder containing the templates used for IDP interactions. |
 
diff --git a/src/init/AppRunner.ts b/src/init/AppRunner.ts
index 3ab37f344..77401794c 100644
--- a/src/init/AppRunner.ts
+++ b/src/init/AppRunner.ts
@@ -44,41 +44,32 @@ export class AppRunner {
   } = {}): void {
     // Parse the command-line arguments
     const { argv: params } = yargs(argv.slice(2))
+      .strict()
       .usage('node ./bin/server.js [args]')
-      .check((args, options): boolean => {
-        // Only take flags as arguments, not filenames
-        if (args._ && args._.length > 0) {
-          throw new Error(`Unsupported arguments: ${args._.join('", "')}`);
+      .check((args): boolean => {
+        if (args._.length > 0) {
+          throw new Error(`Unsupported positional arguments: "${args._.join('", "')}"`);
         }
-        for (const key in args) {
-          // Skip filename arguments (_) and the script name ($0)
-          if (key !== '_' && key !== '$0') {
-            // Check if the argument occurs in the provided options list
-            if (!options[key]) {
-              throw new Error(`Unknown option: "${key}"`);
-            }
-            // Check if the argument actually has a value ('> ./bin/server.js -s' is not valid)
-            if (!args[key]) {
-              throw new Error(`Missing value for argument "${key}"`);
-            }
-            // Check if the argument only has 1 value
-            if (Array.isArray(args[key])) {
-              throw new Error(`Multiple values were provided for: "${key}", [${args[key]}]`);
-            }
+        for (const key of Object.keys(args)) {
+          // We have no options that allow for arrays
+          const val = args[key];
+          if (key !== '_' && Array.isArray(val)) {
+            throw new Error(`Multiple values were provided for: "${key}": "${val.join('", "')}"`);
           }
         }
         return true;
       })
       .options({
-        baseUrl: { type: 'string', alias: 'b' },
-        config: { type: 'string', alias: 'c' },
-        loggingLevel: { type: 'string', alias: 'l', default: 'info' },
-        mainModulePath: { type: 'string', alias: 'm' },
-        idpTemplateFolder: { type: 'string' },
-        port: { type: 'number', alias: 'p', default: 3000 },
-        rootFilePath: { type: 'string', alias: 'f', default: './' },
-        sparqlEndpoint: { type: 'string', alias: 's' },
-        podConfigJson: { type: 'string', default: './pod-config.json' },
+        baseUrl: { type: 'string', alias: 'b', requiresArg: true },
+        config: { type: 'string', alias: 'c', requiresArg: true },
+        loggingLevel: { type: 'string', alias: 'l', default: 'info', requiresArg: true },
+        mainModulePath: { type: 'string', alias: 'm', requiresArg: true },
+        idpTemplateFolder: { type: 'string', requiresArg: true },
+        port: { type: 'number', alias: 'p', default: 3000, requiresArg: true },
+        rootFilePath: { type: 'string', alias: 'f', default: './', requiresArg: true },
+        showStackTrace: { type: 'boolean', alias: 't', default: false },
+        sparqlEndpoint: { type: 'string', alias: 's', requiresArg: true },
+        podConfigJson: { type: 'string', default: './pod-config.json', requiresArg: true },
       })
       .help();
 
@@ -129,6 +120,7 @@ export class AppRunner {
       'urn:solid-server:default:variable:rootFilePath':
         this.resolveFilePath(params.rootFilePath),
       'urn:solid-server:default:variable:sparqlEndpoint': params.sparqlEndpoint,
+      'urn:solid-server:default:variable:showStackTrace': params.showStackTrace,
       'urn:solid-server:default:variable:podConfigJson':
         this.resolveFilePath(params.podConfigJson),
       'urn:solid-server:default:variable:idpTemplateFolder':
@@ -158,6 +150,7 @@ export interface ConfigVariables {
   baseUrl?: string;
   rootFilePath?: string;
   sparqlEndpoint?: string;
+  showStackTrace?: boolean;
   podConfigJson?: string;
   idpTemplateFolder?: string;
 }
diff --git a/test/integration/DynamicPods.test.ts b/test/integration/DynamicPods.test.ts
index 09defde89..7ed55ed8f 100644
--- a/test/integration/DynamicPods.test.ts
+++ b/test/integration/DynamicPods.test.ts
@@ -38,6 +38,7 @@ describe.each(configs)('A dynamic pod server with template config %s', (template
       'urn:solid-server:default:variable:baseUrl': baseUrl,
       'urn:solid-server:default:variable:rootFilePath': rootFilePath,
       'urn:solid-server:default:variable:podConfigJson': podConfigJson,
+      'urn:solid-server:default:variable:showStackTrace': true,
       'urn:solid-server:default:variable:idpTemplateFolder': joinFilePath(__dirname, '../../templates/idp'),
     };
 
diff --git a/test/integration/Identity.test.ts b/test/integration/Identity.test.ts
index fb795a161..49d48ca44 100644
--- a/test/integration/Identity.test.ts
+++ b/test/integration/Identity.test.ts
@@ -63,6 +63,7 @@ describe('A Solid server with IDP', (): void => {
       getTestConfigPath('server-memory.json'),
       {
         'urn:solid-server:default:variable:baseUrl': baseUrl,
+        'urn:solid-server:default:variable:showStackTrace': true,
         'urn:solid-server:default:variable:idpTemplateFolder': joinFilePath(__dirname, '../../templates/idp'),
       },
     ) as Record<string, any>;
diff --git a/test/integration/LdpHandlerWithAuth.test.ts b/test/integration/LdpHandlerWithAuth.test.ts
index a44692a98..05c4eb1d1 100644
--- a/test/integration/LdpHandlerWithAuth.test.ts
+++ b/test/integration/LdpHandlerWithAuth.test.ts
@@ -40,6 +40,7 @@ describe.each(stores)('An LDP handler with auth using %s', (name, { storeConfig,
   beforeAll(async(): Promise<void> => {
     const variables: Record<string, any> = {
       'urn:solid-server:default:variable:baseUrl': baseUrl,
+      'urn:solid-server:default:variable:showStackTrace': true,
       'urn:solid-server:default:variable:rootFilePath': rootFilePath,
     };
 
diff --git a/test/integration/LdpHandlerWithoutAuth.test.ts b/test/integration/LdpHandlerWithoutAuth.test.ts
index 009c7c5f0..e2249434f 100644
--- a/test/integration/LdpHandlerWithoutAuth.test.ts
+++ b/test/integration/LdpHandlerWithoutAuth.test.ts
@@ -34,6 +34,7 @@ describe.each(stores)('An LDP handler allowing all requests %s', (name, { storeC
   beforeAll(async(): Promise<void> => {
     const variables: Record<string, any> = {
       'urn:solid-server:default:variable:baseUrl': baseUrl,
+      'urn:solid-server:default:variable:showStackTrace': true,
       'urn:solid-server:default:variable:rootFilePath': rootFilePath,
     };
 
diff --git a/test/integration/Middleware.test.ts b/test/integration/Middleware.test.ts
index 9410cc7f0..9d7feb393 100644
--- a/test/integration/Middleware.test.ts
+++ b/test/integration/Middleware.test.ts
@@ -25,6 +25,7 @@ describe('An http server with middleware', (): void => {
       {
         'urn:solid-server:default:LdpHandler': new SimpleHttpHandler(),
         'urn:solid-server:default:variable:baseUrl': 'https://example.pod/',
+        'urn:solid-server:default:variable:showStackTrace': true,
       },
     ) as BaseHttpServerFactory;
     server = factory.startServer(port);
diff --git a/test/integration/RedisResourceLockerIntegration.test.ts b/test/integration/RedisResourceLockerIntegration.test.ts
index 7c5c71584..d31a714b7 100644
--- a/test/integration/RedisResourceLockerIntegration.test.ts
+++ b/test/integration/RedisResourceLockerIntegration.test.ts
@@ -21,6 +21,7 @@ describeIf('docker', 'A server with a RedisResourceLocker as ResourceLocker', ()
       getTestConfigPath('run-with-redlock.json'),
       {
         'urn:solid-server:default:variable:baseUrl': baseUrl,
+        'urn:solid-server:default:variable:showStackTrace': true,
       },
     ) as Record<string, any>;
     ({ factory, locker } = instances);
diff --git a/test/integration/ServerFetch.test.ts b/test/integration/ServerFetch.test.ts
index c91b87e1f..6c6df074b 100644
--- a/test/integration/ServerFetch.test.ts
+++ b/test/integration/ServerFetch.test.ts
@@ -22,6 +22,7 @@ describe('A Solid server', (): void => {
       getTestConfigPath('server-memory.json'),
       {
         'urn:solid-server:default:variable:baseUrl': baseUrl,
+        'urn:solid-server:default:variable:showStackTrace': true,
         'urn:solid-server:default:variable:idpTemplateFolder': '',
       },
     ) as Record<string, any>;
diff --git a/test/integration/SparqlStorage.test.ts b/test/integration/SparqlStorage.test.ts
index 490433b98..fdc3047a6 100644
--- a/test/integration/SparqlStorage.test.ts
+++ b/test/integration/SparqlStorage.test.ts
@@ -18,6 +18,7 @@ describeIf('docker', 'A server with a SPARQL endpoint as storage', (): void => {
   beforeAll(async(): Promise<void> => {
     const variables: Record<string, any> = {
       'urn:solid-server:default:variable:baseUrl': baseUrl,
+      'urn:solid-server:default:variable:showStackTrace': true,
       'urn:solid-server:default:variable:sparqlEndpoint': 'http://localhost:4000/sparql',
     };
 
diff --git a/test/integration/Subdomains.test.ts b/test/integration/Subdomains.test.ts
index c1b4b2d1e..4283a9a57 100644
--- a/test/integration/Subdomains.test.ts
+++ b/test/integration/Subdomains.test.ts
@@ -37,6 +37,7 @@ describe.each(stores)('A subdomain server with %s', (name, { storeConfig, teardo
     const variables: Record<string, any> = {
       'urn:solid-server:default:variable:baseUrl': baseUrl,
       'urn:solid-server:default:variable:rootFilePath': rootFilePath,
+      'urn:solid-server:default:variable:showStackTrace': true,
       'urn:solid-server:default:variable:idpTemplateFolder': joinFilePath(__dirname, '../../templates/idp'),
     };
 
diff --git a/test/integration/WebSocketsProtocol.test.ts b/test/integration/WebSocketsProtocol.test.ts
index 17cdeefdd..343bf23ea 100644
--- a/test/integration/WebSocketsProtocol.test.ts
+++ b/test/integration/WebSocketsProtocol.test.ts
@@ -18,6 +18,7 @@ describe('A server with the Solid WebSockets API behind a proxy', (): void => {
       getTestConfigPath('server-without-auth.json'),
       {
         'urn:solid-server:default:variable:baseUrl': 'https://example.pod/',
+        'urn:solid-server:default:variable:showStackTrace': true,
       },
     ) as HttpServerFactory;
     server = factory.startServer(port);
diff --git a/test/unit/init/AppRunner.test.ts b/test/unit/init/AppRunner.test.ts
index 7b5b1af50..af8288dc2 100644
--- a/test/unit/init/AppRunner.test.ts
+++ b/test/unit/init/AppRunner.test.ts
@@ -44,6 +44,7 @@ describe('AppRunner', (): void => {
           port: 3000,
           loggingLevel: 'info',
           rootFilePath: '/var/cwd/',
+          showStackTrace: false,
           podConfigJson: '/var/cwd/pod-config.json',
         },
       );
@@ -67,6 +68,7 @@ describe('AppRunner', (): void => {
             'urn:solid-server:default:variable:rootFilePath': '/var/cwd/',
             'urn:solid-server:default:variable:sparqlEndpoint': undefined,
             'urn:solid-server:default:variable:loggingLevel': 'info',
+            'urn:solid-server:default:variable:showStackTrace': false,
             'urn:solid-server:default:variable:podConfigJson': '/var/cwd/pod-config.json',
             'urn:solid-server:default:variable:idpTemplateFolder': joinFilePath(__dirname, '../../../templates/idp'),
           },
@@ -107,6 +109,7 @@ describe('AppRunner', (): void => {
             'urn:solid-server:default:variable:rootFilePath': '/var/cwd/',
             'urn:solid-server:default:variable:sparqlEndpoint': undefined,
             'urn:solid-server:default:variable:loggingLevel': 'info',
+            'urn:solid-server:default:variable:showStackTrace': false,
             'urn:solid-server:default:variable:podConfigJson': '/var/cwd/pod-config.json',
             'urn:solid-server:default:variable:idpTemplateFolder': joinFilePath(__dirname, '../../../templates/idp'),
           },
@@ -127,6 +130,7 @@ describe('AppRunner', (): void => {
           '-m', 'module/path',
           '-p', '4000',
           '-s', 'http://localhost:5000/sparql',
+          '-t',
           '--podConfigJson', '/different-path.json',
           '--idpTemplateFolder', 'templates/idp',
         ],
@@ -154,6 +158,7 @@ describe('AppRunner', (): void => {
             'urn:solid-server:default:variable:port': 4000,
             'urn:solid-server:default:variable:rootFilePath': '/root',
             'urn:solid-server:default:variable:sparqlEndpoint': 'http://localhost:5000/sparql',
+            'urn:solid-server:default:variable:showStackTrace': true,
             'urn:solid-server:default:variable:podConfigJson': '/different-path.json',
             'urn:solid-server:default:variable:idpTemplateFolder': '/var/cwd/templates/idp',
           },
@@ -172,6 +177,7 @@ describe('AppRunner', (): void => {
           '--port', '4000',
           '--rootFilePath', 'root',
           '--sparqlEndpoint', 'http://localhost:5000/sparql',
+          '--showStackTrace',
           '--podConfigJson', '/different-path.json',
           '--idpTemplateFolder', 'templates/idp',
         ],
@@ -199,6 +205,7 @@ describe('AppRunner', (): void => {
             'urn:solid-server:default:variable:port': 4000,
             'urn:solid-server:default:variable:rootFilePath': '/var/cwd/root',
             'urn:solid-server:default:variable:sparqlEndpoint': 'http://localhost:5000/sparql',
+            'urn:solid-server:default:variable:showStackTrace': true,
             'urn:solid-server:default:variable:podConfigJson': '/different-path.json',
             'urn:solid-server:default:variable:idpTemplateFolder': '/var/cwd/templates/idp',
           },
@@ -217,6 +224,7 @@ describe('AppRunner', (): void => {
         '-m', 'module/path',
         '-p', '4000',
         '-s', 'http://localhost:5000/sparql',
+        '-t',
         '--podConfigJson', '/different-path.json',
         '--idpTemplateFolder', 'templates/idp',
       ];
@@ -245,6 +253,7 @@ describe('AppRunner', (): void => {
             'urn:solid-server:default:variable:port': 4000,
             'urn:solid-server:default:variable:rootFilePath': '/root',
             'urn:solid-server:default:variable:sparqlEndpoint': 'http://localhost:5000/sparql',
+            'urn:solid-server:default:variable:showStackTrace': true,
             'urn:solid-server:default:variable:podConfigJson': '/different-path.json',
             'urn:solid-server:default:variable:idpTemplateFolder': '/var/cwd/templates/idp',
           },
@@ -293,9 +302,7 @@ describe('AppRunner', (): void => {
 
     it('exits when unknown options are passed to the main executable.', async(): Promise<void> => {
       new AppRunner().runCli({
-        argv: [
-          'node', 'script', '--foo',
-        ],
+        argv: [ 'node', 'script', '--foo' ],
       });
 
       // Wait until initializer has been called, because we can't await AppRunner.run.
@@ -303,16 +310,14 @@ describe('AppRunner', (): void => {
         setImmediate(resolve);
       });
 
-      expect(error).toHaveBeenCalledWith('Unknown option: "foo"');
+      expect(error).toHaveBeenCalledWith('Unknown argument: foo');
       expect(exit).toHaveBeenCalledTimes(1);
       expect(exit).toHaveBeenCalledWith(1);
     });
 
     it('exits when no value is passed to the main executable for an argument.', async(): Promise<void> => {
       new AppRunner().runCli({
-        argv: [
-          'node', 'script', '-s',
-        ],
+        argv: [ 'node', 'script', '-s' ],
       });
 
       // Wait until initializer has been called, because we can't await AppRunner.run.
@@ -320,16 +325,14 @@ describe('AppRunner', (): void => {
         setImmediate(resolve);
       });
 
-      expect(error).toHaveBeenCalledWith('Missing value for argument "s"');
+      expect(error).toHaveBeenCalledWith('Not enough arguments following: s');
       expect(exit).toHaveBeenCalledTimes(1);
       expect(exit).toHaveBeenCalledWith(1);
     });
 
     it('exits when unknown parameters are passed to the main executable.', async(): Promise<void> => {
       new AppRunner().runCli({
-        argv: [
-          'node', 'script', 'foo', 'bar', 'foo.txt', 'bar.txt',
-        ],
+        argv: [ 'node', 'script', 'foo', 'bar', 'foo.txt', 'bar.txt' ],
       });
 
       // Wait until initializer has been called, because we can't await AppRunner.run.
@@ -337,17 +340,14 @@ describe('AppRunner', (): void => {
         setImmediate(resolve);
       });
 
-      // There seems to be an issue with yargs where the first and last `"` are missing.
-      expect(error).toHaveBeenCalledWith('Unsupported arguments: foo", "bar", "foo.txt", "bar.txt');
+      expect(error).toHaveBeenCalledWith('Unsupported positional arguments: "foo", "bar", "foo.txt", "bar.txt"');
       expect(exit).toHaveBeenCalledTimes(1);
       expect(exit).toHaveBeenCalledWith(1);
     });
 
     it('exits when multiple values for a parameter are passed.', async(): Promise<void> => {
       new AppRunner().runCli({
-        argv: [
-          'node', 'script', '-ll',
-        ],
+        argv: [ 'node', 'script', '-l', 'info', '-l', 'debug' ],
       });
 
       // Wait until initializer has been called, because we can't await AppRunner.run.
@@ -355,7 +355,7 @@ describe('AppRunner', (): void => {
         setImmediate(resolve);
       });
 
-      expect(error).toHaveBeenCalledWith('Multiple values were provided for: "l", [info,info]');
+      expect(error).toHaveBeenCalledWith('Multiple values were provided for: "l": "info", "debug"');
       expect(exit).toHaveBeenCalledTimes(1);
       expect(exit).toHaveBeenCalledWith(1);
     });