diff --git a/cmake/firebase_unity_version.cmake b/cmake/firebase_unity_version.cmake
index 0b0c0829..775fd127 100644
--- a/cmake/firebase_unity_version.cmake
+++ b/cmake/firebase_unity_version.cmake
@@ -14,7 +14,7 @@
 
 # This file defines the version numbers used by the Firebase Unity SDK.
 
-set(FIREBASE_UNITY_SDK_VERSION "12.2.0"
+set(FIREBASE_UNITY_SDK_VERSION "12.2.1"
     CACHE STRING "The version of the Unity SDK, used in the names of files.")
 
 set(FIREBASE_IOS_POD_VERSION "11.0.0"
diff --git a/docs/readme.md b/docs/readme.md
index d306c565..03225a0f 100644
--- a/docs/readme.md
+++ b/docs/readme.md
@@ -71,7 +71,7 @@ Support
 
 Release Notes
 -------------
-### Upcoming
+### 12.2.1
 - Changes
     - Messaging: Fixed a crash when opening a push notification.
       ([#1091](https://github.com/firebase/firebase-unity-sdk/issues/1091)).
diff --git a/unity_packer/guids.json b/unity_packer/guids.json
index 85277e81..a577c391 100644
--- a/unity_packer/guids.json
+++ b/unity_packer/guids.json
@@ -1216,6 +1216,49 @@
         "Firebase/m2repository/com/google/firebase/firebase-storage-unity/12.2.0/firebase-storage-unity-12.2.0.pom": "d5baf983f43d48608366c4919d67ff5f",
         "Firebase/m2repository/com/google/firebase/firebase-storage-unity/12.2.0/firebase-storage-unity-12.2.0.srcaar": "023b50635d544abebcb4aa06901d1c92"
     },
+    "12.2.1": {
+        "Firebase/Editor/FirebaseAnalytics_version-12.2.1_manifest.txt": "95e4111aec434c64886f90cd514074de",
+        "Firebase/Editor/FirebaseAppCheck_version-12.2.1_manifest.txt": "8fa0cb08a0b5428e81c60ac9cd0f054b",
+        "Firebase/Editor/FirebaseAuth_version-12.2.1_manifest.txt": "46bf0951a06e4b64ada149c3858600a3",
+        "Firebase/Editor/FirebaseCrashlytics_version-12.2.1_manifest.txt": "fd1dd453359f414390243a9d61840560",
+        "Firebase/Editor/FirebaseDatabase_version-12.2.1_manifest.txt": "e4772de6363c4670acfd0787f655e3c1",
+        "Firebase/Editor/FirebaseDynamicLinks_version-12.2.1_manifest.txt": "389beea462034d6c97855b492ea24de7",
+        "Firebase/Editor/FirebaseFirestore_version-12.2.1_manifest.txt": "2d63f64dbc234567b1700f8fdd84a743",
+        "Firebase/Editor/FirebaseFunctions_version-12.2.1_manifest.txt": "6015f0672f3047128b7aafef04166ba8",
+        "Firebase/Editor/FirebaseInstallations_version-12.2.1_manifest.txt": "a5214f8152b0403b89abd91b4f7486a9",
+        "Firebase/Editor/FirebaseMessaging_version-12.2.1_manifest.txt": "7ddd5019687943e186ba930fa0676af0",
+        "Firebase/Editor/FirebaseRemoteConfig_version-12.2.1_manifest.txt": "aa26cea900414295a091b72303ac4acd",
+        "Firebase/Editor/FirebaseStorage_version-12.2.1_manifest.txt": "5e9c7582a98b4664b1e0f332184cd900",
+        "Firebase/Plugins/x86_64/FirebaseCppApp-12_2_1.bundle": "08e634ef76f54752a45e52a09cab8bef",
+        "Firebase/Plugins/x86_64/FirebaseCppApp-12_2_1.dll": "0f69e87dc62949b0abc7b2e15a5acc11",
+        "Firebase/Plugins/x86_64/FirebaseCppApp-12_2_1.so": "6a164bb00f1f42c9a0b02782c09b9c2f",
+        "Firebase/m2repository/com/google/firebase/firebase-analytics-unity/12.2.1/firebase-analytics-unity-12.2.1.pom": "b6d711d9173040908f8c051c6182d9f1",
+        "Firebase/m2repository/com/google/firebase/firebase-analytics-unity/12.2.1/firebase-analytics-unity-12.2.1.srcaar": "7ffe56a050254f15bcf9e2b589c985b8",
+        "Firebase/m2repository/com/google/firebase/firebase-app-unity/12.2.1/firebase-app-unity-12.2.1.pom": "bbc14266975749e0a6493aaf6bfb4942",
+        "Firebase/m2repository/com/google/firebase/firebase-app-unity/12.2.1/firebase-app-unity-12.2.1.srcaar": "5589bbfd352f40b9a120338a47d0c13d",
+        "Firebase/m2repository/com/google/firebase/firebase-appcheck-unity/12.2.1/firebase-appcheck-unity-12.2.1.pom": "4e696b09a95f4f61bce9e91a38f86b36",
+        "Firebase/m2repository/com/google/firebase/firebase-appcheck-unity/12.2.1/firebase-appcheck-unity-12.2.1.srcaar": "cec3ef9ee59d4a78a59e1d19d9101bd5",
+        "Firebase/m2repository/com/google/firebase/firebase-auth-unity/12.2.1/firebase-auth-unity-12.2.1.pom": "f6526929c41b420b8b4c3fcd5dd20cdf",
+        "Firebase/m2repository/com/google/firebase/firebase-auth-unity/12.2.1/firebase-auth-unity-12.2.1.srcaar": "f72daeac02004099be2d35e3ef56bf76",
+        "Firebase/m2repository/com/google/firebase/firebase-config-unity/12.2.1/firebase-config-unity-12.2.1.pom": "e9441122ffb341629e85302c6f33ab9a",
+        "Firebase/m2repository/com/google/firebase/firebase-config-unity/12.2.1/firebase-config-unity-12.2.1.srcaar": "5848c9a007794662be14c0853f88519a",
+        "Firebase/m2repository/com/google/firebase/firebase-crashlytics-unity/12.2.1/firebase-crashlytics-unity-12.2.1.pom": "f6fec55071d84bbd9025ef6161eae703",
+        "Firebase/m2repository/com/google/firebase/firebase-crashlytics-unity/12.2.1/firebase-crashlytics-unity-12.2.1.srcaar": "613349d9dcf84faba5fb343de0b9ff37",
+        "Firebase/m2repository/com/google/firebase/firebase-database-unity/12.2.1/firebase-database-unity-12.2.1.pom": "c126660b9632460c8ca2bb0e1f4a3b71",
+        "Firebase/m2repository/com/google/firebase/firebase-database-unity/12.2.1/firebase-database-unity-12.2.1.srcaar": "4de7b105aa324d11a100473b4e8dcb03",
+        "Firebase/m2repository/com/google/firebase/firebase-dynamic-links-unity/12.2.1/firebase-dynamic-links-unity-12.2.1.pom": "37911a48426646bb86ab44ddeb0ff5f9",
+        "Firebase/m2repository/com/google/firebase/firebase-dynamic-links-unity/12.2.1/firebase-dynamic-links-unity-12.2.1.srcaar": "753ca0ba70fd4337810b72022165c14d",
+        "Firebase/m2repository/com/google/firebase/firebase-firestore-unity/12.2.1/firebase-firestore-unity-12.2.1.pom": "5799154bb59d4cf88f54baca6efe84bc",
+        "Firebase/m2repository/com/google/firebase/firebase-firestore-unity/12.2.1/firebase-firestore-unity-12.2.1.srcaar": "b76d1170a4a94e87a191f7565c0db812",
+        "Firebase/m2repository/com/google/firebase/firebase-functions-unity/12.2.1/firebase-functions-unity-12.2.1.pom": "b4f369e32c2944c0954b3a81c952d996",
+        "Firebase/m2repository/com/google/firebase/firebase-functions-unity/12.2.1/firebase-functions-unity-12.2.1.srcaar": "ab223019f5dd4e3aba823420fcb648dd",
+        "Firebase/m2repository/com/google/firebase/firebase-installations-unity/12.2.1/firebase-installations-unity-12.2.1.pom": "5972eb56f2cb46068c81bc3eb2a7da4c",
+        "Firebase/m2repository/com/google/firebase/firebase-installations-unity/12.2.1/firebase-installations-unity-12.2.1.srcaar": "c02f7514378449a389e8372c1e922bea",
+        "Firebase/m2repository/com/google/firebase/firebase-messaging-unity/12.2.1/firebase-messaging-unity-12.2.1.pom": "a27447ca360f4b128701c06a7573872a",
+        "Firebase/m2repository/com/google/firebase/firebase-messaging-unity/12.2.1/firebase-messaging-unity-12.2.1.srcaar": "d031b3ad4309491bb72f1a274b47ca3d",
+        "Firebase/m2repository/com/google/firebase/firebase-storage-unity/12.2.1/firebase-storage-unity-12.2.1.pom": "370b3716f5874a4082c785d946793b6a",
+        "Firebase/m2repository/com/google/firebase/firebase-storage-unity/12.2.1/firebase-storage-unity-12.2.1.srcaar": "497d4b26a71c4e1ebeccfe1969060e7e"
+    },
     "3.0.0": {
         "Firebase/Editor/FirebaseAnalytics_v3.0.0_manifest.txt": "13c9ba8e35174de78ad7ca9a48cba9f0",
         "Firebase/Editor/FirebaseAuth_v3.0.0_manifest.txt": "eaa139bec35e491da653b612e67134ad",