diff --git a/Crashlytics/CHANGELOG.md b/Crashlytics/CHANGELOG.md
index bf9e5532d29..fa67c39d6a7 100644
--- a/Crashlytics/CHANGELOG.md
+++ b/Crashlytics/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [fixed] Resolved compiler warnings related to constant definitions. (#15059)
 
 # 11.13.0
diff --git a/FirebaseAI/CHANGELOG.md b/FirebaseAI/CHANGELOG.md
index 0c0768cae07..47b2627da67 100644
--- a/FirebaseAI/CHANGELOG.md
+++ b/FirebaseAI/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [added] Added support for Grounding with Google Search. (#15014)
 - [removed] Removed `CountTokensResponse.totalBillableCharacters` which was
   deprecated in 11.15.0. Use `totalTokens` instead. (#15056)
diff --git a/FirebaseAuth/CHANGELOG.md b/FirebaseAuth/CHANGELOG.md
index 71ae4b00f94..143e9dfedc6 100644
--- a/FirebaseAuth/CHANGELOG.md
+++ b/FirebaseAuth/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [removed] **Breaking Change**: Removed the following Dynamic Links related
   APIs:
   - `ActionCodeSettings.dynamicLinkDomain`
diff --git a/FirebaseCore/CHANGELOG.md b/FirebaseCore/CHANGELOG.md
index 16c8c30b0ce..57dc207d1b0 100644
--- a/FirebaseCore/CHANGELOG.md
+++ b/FirebaseCore/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Unreleased
+# Firebase 12.0.0
 - [changed] **Breaking change**: Firebase's minimum supported versions have
   updated for the following platforms:
     - | Platform  | Firebase 12 |
diff --git a/FirebaseFunctions/CHANGELOG.md b/FirebaseFunctions/CHANGELOG.md
index 9bb5c1aa365..12f2743bdd9 100644
--- a/FirebaseFunctions/CHANGELOG.md
+++ b/FirebaseFunctions/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [changed] **Breaking Change**: Mark `HTTPSCallable` and `HTTPSCallableOptions`
   as `final` classes for Swift clients. This was to achieve Swift 6 checked
   `Sendable` support.
diff --git a/FirebaseRemoteConfig/CHANGELOG.md b/FirebaseRemoteConfig/CHANGELOG.md
index dfabf29af0f..f1b25939183 100644
--- a/FirebaseRemoteConfig/CHANGELOG.md
+++ b/FirebaseRemoteConfig/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [added] Improved how the SDK handles real-time requests when a Firebase
   project has exceeded its available quota for real-time services.
   Released in anticipation of future quota enforcement, this change is
diff --git a/FirebaseStorage/CHANGELOG.md b/FirebaseStorage/CHANGELOG.md
index 1f051c466ba..fca3085cc3b 100644
--- a/FirebaseStorage/CHANGELOG.md
+++ b/FirebaseStorage/CHANGELOG.md
@@ -1,4 +1,4 @@
-# Unreleased
+# 12.0.0
 - [removed] **Breaking change**: Removed the following unused API,
   `StorageMetadata.storageReference`.