diff --git a/src/__tests__/acp-providers.test.ts b/src/__tests__/acp-providers.test.ts
index f637721..02a7fd5 100644
--- a/src/__tests__/acp-providers.test.ts
+++ b/src/__tests__/acp-providers.test.ts
@@ -41,7 +41,7 @@ describe('ACP provider credential descriptors', () => {
 
   it('uses the maintained Codex adapter and exposes GPT-5.6 models', () => {
     const codex = ACP_PROVIDERS.codex;
-    expect(codex.default_command).toEqual(['npx', '-y', '@agentclientprotocol/codex-acp@1.1.7']);
+    expect(codex.default_command).toEqual(['npx', '-y', '@agentclientprotocol/codex-acp@1.1.2']);
     expect(codex.default_session_mode).toBe('agent-full-access');
     expect(codex.available_models.map((model) => model.id)).toEqual(
       expect.arrayContaining(['gpt-5.6', 'gpt-5.6-sol', 'gpt-5.6-terra', 'gpt-5.6-luna'])
diff --git a/src/models/acp-providers.json b/src/models/acp-providers.json
index d76a1e8..f9fb0be 100644
--- a/src/models/acp-providers.json
+++ b/src/models/acp-providers.json
@@ -2,7 +2,7 @@
   "claude-code": {
     "key": "claude-code",
     "display_name": "Claude Code",
-    "default_command": ["npx", "-y", "@agentclientprotocol/claude-agent-acp@0.63.0"],
+    "default_command": ["npx", "-y", "@agentclientprotocol/claude-agent-acp@0.44.0"],
     "api_key_env_var": "ANTHROPIC_API_KEY",
     "base_url_env_var": "ANTHROPIC_BASE_URL",
     "default_session_mode": "bypassPermissions",
@@ -40,7 +40,7 @@
   "codex": {
     "key": "codex",
     "display_name": "Codex",
-    "default_command": ["npx", "-y", "@agentclientprotocol/codex-acp@1.1.7"],
+    "default_command": ["npx", "-y", "@agentclientprotocol/codex-acp@1.1.2"],
     "api_key_env_var": "OPENAI_API_KEY",
     "base_url_env_var": "OPENAI_BASE_URL",
     "default_session_mode": "agent-full-access",