diff --git a/README.md b/README.md
index 551d8f457..7c0dc0a06 100644
--- a/README.md
+++ b/README.md
@@ -6,14 +6,14 @@ Official web site: http://clojurescript.org
 
 ## Releases and dependency information ##
 
-Latest stable release: 1.10.844
+Latest stable release: 1.10.866
 
 * [All released versions](http://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22org.clojure%22%20AND%20a%3A%22clojurescript%22)
 
 [Leiningen](http://github.com/technomancy/leiningen/) dependency information:
 
 ```
-[org.clojure/clojurescript "1.10.844"]
+[org.clojure/clojurescript "1.10.866"]
 ```
 
 [Maven](http://maven.apache.org) dependency information:
@@ -22,7 +22,7 @@ Latest stable release: 1.10.844
 <dependency>
   <groupId>org.clojure</groupId>
   <artifactId>clojurescript</artifactId>
-  <version>1.10.844</version>
+  <version>1.10.866</version>
 </dependency>
 ```
 
diff --git a/changes.md b/changes.md
index 396d91d85..6b764d545 100644
--- a/changes.md
+++ b/changes.md
@@ -1,3 +1,31 @@
+## 1.10.866
+
+### Changes
+* Google Closure v20210505
+
+### Enhancements
+* CLJS-3260: and/or optimization as compiler pass, fixes core.async go macro issue
+* CLJS-3276: Support macros that expand to require statements
+
+
+### Fixes
+* CLJS-3309: and/or opt bug - passes to remove dropped locals from anon fns,
+  missing :children keys on binding nodes
+* CLJS-3300: cljs.loader regression
+* CLJS-3293: Some npm packages fail to require
+* CLJS-3306: subvecs must implement IAssociative -contains-key?
+* CLJS-3307: Allow extending IAssociative -contains-key? to native
+* CLJS-3305: defrecord must implement IAssociative -contains-key?
+* CLJS-3303: checked arrays enabled in advanced
+* CLJS-3304: Higher order checked arrays
+* CLJS-3284: Use of private deftype by public function in another namespace when
+  inside an if causes warning
+* CLJS-3282: document bundle target in CLI help
+* CLJS-3283: Support -contains-key? protocol check in contains?
+* CLJS-3296: Update conj docstring for missing arities
+* CLJS-3298: visibility diagnostic group typo
+* CLJS-3302: Fixup docstring for `default-dispatch-val` and `dispatch-fn`
+
 ## 1.10.844
 
 ### Changes