diff --git a/blockdag/dag.go b/blockdag/dag.go
index 43ba8b5a2..3fe327e47 100644
--- a/blockdag/dag.go
+++ b/blockdag/dag.go
@@ -1194,7 +1194,19 @@ func (dag *BlockDAG) GetUTXOEntry(outpoint wire.Outpoint) (*UTXOEntry, bool) {
 
 // BlockConfirmationsByHash returns the confirmations number for a block with the
 // given hash. See blockConfirmations for further details.
+//
+// This function is safe for concurrent access
 func (dag *BlockDAG) BlockConfirmationsByHash(hash *daghash.Hash) (uint64, error) {
+	dag.dagLock.RLock()
+	defer dag.dagLock.RUnlock()
+
+	return dag.BlockConfirmationsByHashNoLock(hash)
+}
+
+// BlockConfirmationsByHashNoLock is lock free version of BlockConfirmationsByHash
+//
+// This function is unsafe for concurrent access.
+func (dag *BlockDAG) BlockConfirmationsByHashNoLock(hash *daghash.Hash) (uint64, error) {
 	if hash.IsEqual(&daghash.ZeroHash) {
 		return 0, nil
 	}
@@ -1286,6 +1298,8 @@ func (dag *BlockDAG) oldestChainBlockWithBlueScoreGreaterThan(blueScore uint64)
 }
 
 // IsInSelectedPathChain returns whether or not a block hash is found in the selected path
+//
+// This method MUST be called with the DAG lock held
 func (dag *BlockDAG) IsInSelectedPathChain(blockHash *daghash.Hash) bool {
 	return dag.virtual.selectedPathChainSet.containsHash(blockHash)
 }
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index a4a04a74a..63ce69476 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -12,7 +12,7 @@ services:
       "--addrindex",
       # "--generate",
       "--nodnsseed",
-      "--miningaddr=dagtest:qrm4zaetvny2yuh4wudf8y43fd20lunkxs8quragg8",
+      "--miningaddr=dagtest:qrgufg4qzfqacfzrf6xvx46aqedr5nke3qv6a74fex",
       "--rpcuser=user",
       "--rpcpass=pass",
       "--rpclisten=0.0.0.0:18334",
@@ -35,7 +35,7 @@ services:
       "--connect=first",
       "--rpcuser=user",
       "--rpcpass=pass",
-      "--miningaddr=dagtest:qrm4zaetvny2yuh4wudf8y43fd20lunkxs8quragg8",
+      "--miningaddr=dagtest:qrgufg4qzfqacfzrf6xvx46aqedr5nke3qv6a74fex",
       "--rpclisten=0.0.0.0:18334",
       "--rpccert=/go/src/github.com/daglabs/btcd/docker/rpc.cert",
       "--rpckey=/go/src/github.com/daglabs/btcd/docker/rpc.key"
@@ -63,7 +63,7 @@ services:
       "--connect=first",
       "--rpcuser=user",
       "--rpcpass=pass",
-      "--miningaddr=dagtest:qrm4zaetvny2yuh4wudf8y43fd20lunkxs8quragg8",
+      "--miningaddr=dagtest:qrgufg4qzfqacfzrf6xvx46aqedr5nke3qv6a74fex",
       "--rpclisten=0.0.0.0:18334",
       "--rpccert=/go/src/github.com/daglabs/btcd/docker/rpc.cert",
       "--rpckey=/go/src/github.com/daglabs/btcd/docker/rpc.key"