diff --git a/Cargo.lock b/Cargo.lock
index 4c09e7d6b..68f56eca9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2345,7 +2345,7 @@ dependencies = [
 
 [[package]]
 name = "libsignal-ffi"
-version = "0.65.7"
+version = "0.66.1"
 dependencies = [
  "cpufeatures",
  "futures-util",
@@ -2360,14 +2360,14 @@ dependencies = [
 
 [[package]]
 name = "libsignal-jni"
-version = "0.65.7"
+version = "0.66.1"
 dependencies = [
  "libsignal-jni-impl",
 ]
 
 [[package]]
 name = "libsignal-jni-impl"
-version = "0.65.7"
+version = "0.66.1"
 dependencies = [
  "cfg-if",
  "cpufeatures",
@@ -2384,7 +2384,7 @@ dependencies = [
 
 [[package]]
 name = "libsignal-jni-testing"
-version = "0.65.7"
+version = "0.66.1"
 dependencies = [
  "jni 0.21.1",
  "libsignal-bridge-testing",
@@ -2613,7 +2613,7 @@ dependencies = [
 
 [[package]]
 name = "libsignal-node"
-version = "0.65.7"
+version = "0.66.1"
 dependencies = [
  "cmake",
  "futures",
diff --git a/Cargo.toml b/Cargo.toml
index 90c1ba108..481ee6883 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,7 +36,7 @@ default-members = [
 resolver = "2" # so that our dev-dependency features don't leak into products
 
 [workspace.package]
-version = "0.65.7"
+version = "0.66.1"
 rust-version = "1.75"
 authors = ["Signal Messenger LLC"]
 license = "AGPL-3.0-only"
diff --git a/LibSignalClient.podspec b/LibSignalClient.podspec
index 64043c598..f5a486429 100644
--- a/LibSignalClient.podspec
+++ b/LibSignalClient.podspec
@@ -5,7 +5,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'LibSignalClient'
-  s.version          = '0.65.7'
+  s.version          = '0.66.1'
   s.summary          = 'A Swift wrapper library for communicating with the Signal messaging service.'
 
   s.homepage         = 'https://github.com/signalapp/libsignal'
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 480f583da..339aa69b5 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,4 +1,2 @@
-v0.66.0
+v0.66.1
 
-- Removes the ChatService APIs on all platforms. Existing code should be migrated to the newer
-  ChatConnection APIs.
diff --git a/java/build.gradle b/java/build.gradle
index 6e7e9a08a..d7e7ce155 100644
--- a/java/build.gradle
+++ b/java/build.gradle
@@ -6,7 +6,7 @@ plugins {
 }
 
 allprojects {
-    version = "0.65.7"
+    version = "0.66.1"
     group   = "org.signal"
 }
 
diff --git a/java/code_size.json b/java/code_size.json
index b19a21e4e..7c875ecc6 100644
--- a/java/code_size.json
+++ b/java/code_size.json
@@ -510,5 +510,9 @@
   {
     "version": "v0.65.6",
     "size": 5430016
+  },
+  {
+    "version": "v0.66.0",
+    "size": 5233440
   }
 ]
\ No newline at end of file
diff --git a/node/package-lock.json b/node/package-lock.json
index f68f7ca85..ede9d676a 100644
--- a/node/package-lock.json
+++ b/node/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@signalapp/libsignal-client",
-  "version": "0.65.7",
+  "version": "0.66.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@signalapp/libsignal-client",
-      "version": "0.65.7",
+      "version": "0.66.1",
       "hasInstallScript": true,
       "license": "AGPL-3.0-only",
       "dependencies": {
diff --git a/node/package.json b/node/package.json
index 6cacec488..5dcf2652c 100644
--- a/node/package.json
+++ b/node/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@signalapp/libsignal-client",
-  "version": "0.65.7",
+  "version": "0.66.1",
   "license": "AGPL-3.0-only",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
diff --git a/rust/core/src/version.rs b/rust/core/src/version.rs
index 3c893ca8c..7db261df6 100644
--- a/rust/core/src/version.rs
+++ b/rust/core/src/version.rs
@@ -5,4 +5,4 @@
 
 // The value of this constant is updated by the script
 // and should not be manually modified
-pub const VERSION: &str = "0.65.7";
+pub const VERSION: &str = "0.66.1";