diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index efbfbb0d8..030ba3170 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,6 +1,6 @@
 {
-  ".": "1.4.0",
-  "core": "1.4.0",
-  "dev": "1.4.0",
-  "integrations": "1.4.0"
+  ".": "1.0.0",
+  "core": "1.0.0",
+  "dev": "1.0.0",
+  "integrations": "1.0.0"
 }
diff --git a/core/CHANGELOG.md b/core/CHANGELOG.md
index 6494c5d25..2b7a6ec1c 100644
--- a/core/CHANGELOG.md
+++ b/core/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [1.0.0](https://github.com/google/adk-js/compare/adk-v1.4.0...adk-v1.0.0) (2026-07-20)
+
+
+### Miscellaneous Chores
+
+* **adk:** Synchronize adk versions
+
 ## [1.4.0](https://github.com/google/adk-js/compare/adk-v1.3.0...adk-v1.4.0) (2026-07-20)
 
 
diff --git a/core/package.json b/core/package.json
index 9ffcfc289..a5a8e291c 100644
--- a/core/package.json
+++ b/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google/adk",
-  "version": "1.4.0",
+  "version": "1.0.0",
   "description": "Google ADK JS",
   "author": "Google",
   "license": "Apache-2.0",
diff --git a/core/src/version.ts b/core/src/version.ts
index 9947a02f5..50463a260 100644
--- a/core/src/version.ts
+++ b/core/src/version.ts
@@ -5,4 +5,4 @@
  */
 
 // version: major.minor.patch
-export const version = '1.4.0'; // x-release-please-version
+export const version = '1.0.0'; // x-release-please-version
diff --git a/dev/CHANGELOG.md b/dev/CHANGELOG.md
index e49d91f5d..3fb1bd610 100644
--- a/dev/CHANGELOG.md
+++ b/dev/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## [1.0.0](https://github.com/google/adk-js/compare/devtools-v1.4.0...devtools-v1.0.0) (2026-07-20)
+
+
+### Miscellaneous Chores
+
+* **devtools:** Synchronize adk versions
+
+
+### Dependencies
+
+* The following workspace dependencies were updated
+  * dependencies
+    * @google/adk bumped from ^1.4.0 to ^1.0.0
+
 ## [1.4.0](https://github.com/google/adk-js/compare/devtools-v1.3.0...devtools-v1.4.0) (2026-07-20)
 
 
diff --git a/dev/package.json b/dev/package.json
index 717b930e7..4bc607b0e 100644
--- a/dev/package.json
+++ b/dev/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google/adk-devtools",
-  "version": "1.4.0",
+  "version": "1.0.0",
   "description": "Google ADK JS Development Tools",
   "author": "Google",
   "license": "Apache-2.0",
@@ -55,7 +55,7 @@
   },
   "dependencies": {
     "@clack/prompts": "^0.11.0",
-    "@google/adk": "^1.4.0",
+    "@google/adk": "^1.0.0",
     "@mikro-orm/mariadb": "^6.6.6",
     "@mikro-orm/mssql": "^6.6.6",
     "@mikro-orm/mysql": "^6.6.6",
diff --git a/dev/src/version.ts b/dev/src/version.ts
index 9947a02f5..50463a260 100644
--- a/dev/src/version.ts
+++ b/dev/src/version.ts
@@ -5,4 +5,4 @@
  */
 
 // version: major.minor.patch
-export const version = '1.4.0'; // x-release-please-version
+export const version = '1.0.0'; // x-release-please-version
diff --git a/integrations/CHANGELOG.md b/integrations/CHANGELOG.md
index ca4911d87..79f365aee 100644
--- a/integrations/CHANGELOG.md
+++ b/integrations/CHANGELOG.md
@@ -1,5 +1,19 @@
 # Changelog
 
+## [1.0.0](https://github.com/google/adk-js/compare/integrations-v1.4.0...integrations-v1.0.0) (2026-07-20)
+
+
+### Miscellaneous Chores
+
+* **integrations:** Synchronize adk versions
+
+
+### Dependencies
+
+* The following workspace dependencies were updated
+  * dependencies
+    * @google/adk bumped from ^1.4.0 to ^1.0.0
+
 ## [1.4.0](https://github.com/google/adk-js/compare/integrations-v1.3.0...integrations-v1.4.0) (2026-07-20)
 
 
diff --git a/integrations/package.json b/integrations/package.json
index 9fdb600b1..eb0171dac 100644
--- a/integrations/package.json
+++ b/integrations/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@google/adk-integrations",
-  "version": "1.4.0",
+  "version": "1.0.0",
   "description": "Google ADK JS Integrations",
   "author": "Google",
   "license": "Apache-2.0",
@@ -40,6 +40,6 @@
     "prepublishOnly": "npm run build"
   },
   "dependencies": {
-    "@google/adk": "^1.4.0"
+    "@google/adk": "^1.0.0"
   }
 }
diff --git a/integrations/src/version.ts b/integrations/src/version.ts
index 61e363bd8..88a60fb1b 100644
--- a/integrations/src/version.ts
+++ b/integrations/src/version.ts
@@ -5,4 +5,4 @@
  */
 
 // version: major.minor.patch
-export const version = '1.4.0'; // x-release-please-version
+export const version = '1.0.0'; // x-release-please-version
diff --git a/package-lock.json b/package-lock.json
index c38b48387..62426a8a2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "adk",
-  "version": "1.4.0",
+  "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "adk",
-      "version": "1.4.0",
+      "version": "1.0.0",
       "license": "Apache-2.0",
       "workspaces": [
         "core",
@@ -40,7 +40,7 @@
     },
     "core": {
       "name": "@google/adk",
-      "version": "1.4.0",
+      "version": "1.0.0",
       "license": "Apache-2.0",
       "dependencies": {
         "@a2a-js/sdk": "^0.3.10",
@@ -113,11 +113,11 @@
     },
     "dev": {
       "name": "@google/adk-devtools",
-      "version": "1.4.0",
+      "version": "1.0.0",
       "license": "Apache-2.0",
       "dependencies": {
         "@clack/prompts": "^0.11.0",
-        "@google/adk": "^1.4.0",
+        "@google/adk": "^1.0.0",
         "@mikro-orm/mariadb": "^6.6.6",
         "@mikro-orm/mssql": "^6.6.6",
         "@mikro-orm/mysql": "^6.6.6",
@@ -353,10 +353,10 @@
     },
     "integrations": {
       "name": "@google/adk-integrations",
-      "version": "1.4.0",
+      "version": "1.0.0",
       "license": "Apache-2.0",
       "dependencies": {
-        "@google/adk": "^1.4.0"
+        "@google/adk": "^1.0.0"
       }
     },
     "node_modules/@a2a-js/sdk": {
diff --git a/package.json b/package.json
index 86cee8241..3052fbb66 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "adk",
-  "version": "1.4.0",
+  "version": "1.0.0",
   "description": "Google ADK JS",
   "author": "Google",
   "license": "Apache-2.0",