diff --git a/CHANGELOG.md b/CHANGELOG.md
index 09741819a3..50ef7afd74 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,23 @@
+# 0.10.4
+
+## October 9, 2023
+
+Release 0.10.4 is a patch release to correct an issue with the handling of `did:key` routing
+keys in some mediator scenarios, notably with the use of [Aries Framework Kotlin]. See the
+details in the PR and [Issue \#2531 Routing for agents behind a aca-py based mediator is broken].
+
+Thanks to [codespree](https://github.com/codespree) for raising the issue and providing the fix.
+
+[Aries Framework Kotlin](https://github.com/hyperledger/aries-framework-kotlin)
+[Issue \#2531 Routing for agents behind a aca-py based mediator is broken]: https://github.com/hyperledger/aries-cloudagent-python/issue/2531
+
+### 0.10.4 Categorized List of Pull Requests
+
+- DID Handling and Connection Establishment Updates/Fixes
+  - fix: routing behind mediator [\#2536](https://github.com/hyperledger/aries-cloudagent-python/pull/2536) [dbluhm](https://github.com/dbluhm)
+- Release management pull requests
+  - 0.10.4 [\#2539](https://github.com/hyperledger/aries-cloudagent-python/pull/2539) [swcurran](https://github.com/swcurran)
+
 # 0.10.3
 
 ## September 29, 2023
diff --git a/aries_cloudagent/version.py b/aries_cloudagent/version.py
index 5d449263c7..f886588bae 100644
--- a/aries_cloudagent/version.py
+++ b/aries_cloudagent/version.py
@@ -1,4 +1,4 @@
 """Library version information."""
 
-__version__ = "0.10.3"
+__version__ = "0.10.4"
 RECORD_TYPE_ACAPY_VERSION = "acapy_version"
diff --git a/open-api/openapi.json b/open-api/openapi.json
index 47fab1c621..42171196f0 100644
--- a/open-api/openapi.json
+++ b/open-api/openapi.json
@@ -2,7 +2,7 @@
   "openapi" : "3.0.1",
   "info" : {
     "title" : "Aries Cloud Agent",
-    "version" : "v0.10.3"
+    "version" : "v0.10.4"
   },
   "servers" : [ {
     "url" : "/"
diff --git a/open-api/swagger.json b/open-api/swagger.json
index 997561413b..7aca9e88dd 100644
--- a/open-api/swagger.json
+++ b/open-api/swagger.json
@@ -1,7 +1,7 @@
 {
   "swagger" : "2.0",
   "info" : {
-    "version" : "v0.10.3",
+    "version" : "v0.10.4",
     "title" : "Aries Cloud Agent"
   },
   "tags" : [ {