diff --git a/Documentation/learning/why.md b/Documentation/learning/why.md
index 9c6491d47..dfa0fb71e 100644
--- a/Documentation/learning/why.md
+++ b/Documentation/learning/why.md
@@ -104,16 +104,16 @@ The [lock directory][executable-example] contains an executable example which fo
 [cockroach]: https://github.com/cockroachdb/cockroach
 [spanner]: https://cloud.google.com/spanner/
 [tidb]: https://github.com/pingcap/tidb
-[etcd-v3lock]: https://godoc.org/github.com/etcd-io/etcd/etcdserver/api/v3lock/v3lockpb
-[etcd-v3election]: https://godoc.org/github.com/coreos/etcd-io/etcdserver/api/v3election/v3electionpb
-[etcd-etcdctl-lock]: ../../etcdctl/README.md#lock-lockname-command-arg1-arg2-
+[etcd-v3lock]: https://godoc.org/github.com/etcd-io/etcd/server/etcdserver/api/v3lock/v3lockpb
+[etcd-v3election]: https://godoc.org/github.com/etcd-io/etcd/server/etcdserver/api/v3election/v3electionpb
+[etcd-etcdctl-lock]: ../../etcdctl/README.md#lock-options-lockname-command-arg1-arg2-
 [etcd-etcdctl-elect]: ../../etcdctl/README.md#elect-options-election-name-proposal
 [etcd-mvcc]: data_model.md
-[etcd-recipe]: https://godoc.org/github.com/etcd-io/etcd/contrib/recipes
-[consul-lock]: https://www.consul.io/docs/commands/lock.html
+[etcd-recipe]: https://godoc.org/github.com/etcd-io/etcd/client/v3/experimental/recipes
+[consul-lock]: https://www.consul.io/commands/lock
 [newsql-leader]: http://dl.acm.org/citation.cfm?id=2960999
 [etcd-reconfig]: ../op-guide/runtime-configuration.md
-[zk-reconfig]: https://zookeeper.apache.org/doc/trunk/zookeeperReconfig.html
+[zk-reconfig]: https://zookeeper.apache.org/doc/current/zookeeperReconfig.html
 [consul-reconfig]: https://www.consul.io/docs/guides/servers.html
 [etcd-linread]: api_guarantees.md#linearizability
 [consul-linread]: https://www.consul.io/docs/agent/http.html#consistency
@@ -123,7 +123,7 @@ The [lock directory][executable-example] contains an executable example which fo
 [zk-txn]: https://zookeeper.apache.org/doc/r3.4.3/api/org/apache/zookeeper/ZooKeeper.html#multi(java.lang.Iterable)
 [consul-txn]: https://www.consul.io/docs/agent/http/kv.html#txn
 [etcd-watch]: api.md#watch-streams
-[zk-watch]: https://zookeeper.apache.org/doc/trunk/zookeeperProgrammers.html#ch_zkWatches
+[zk-watch]: https://zookeeper.apache.org/doc/current/zookeeperProgrammers.html#ch_zkWatches
 [consul-watch]: https://www.consul.io/docs/agent/watches.html
 [etcd-commonname]: ../op-guide/authentication.md#using-tls-common-name
 [etcd-rbac]: ../op-guide/authentication.md#working-with-roles
@@ -136,7 +136,7 @@ The [lock directory][executable-example] contains an executable example which fo
 [locksmith]: https://github.com/coreos/locksmith
 [kubernetes]: https://kubernetes.io/docs/concepts/overview/what-is-kubernetes/
 [dbtester-comparison-results]: https://github.com/coreos/dbtester/tree/master/test-results/2018Q1-02-etcd-zookeeper-consul
-[etcdlease]: https://godoc.org/github.com/etcd-io/etcd/clientv3#Lease
+[etcdlease]: https://godoc.org/github.com/etcd-io/etcd/client/v3/leasing
 [lease]: https://web.stanford.edu/class/cs240/readings/89-leases.pdf
 [chubby]: https://research.google/pubs/pub27897/
 [fencing]: https://martin.kleppmann.com/2016/02/08/how-to-do-distributed-locking.html