diff --git a/.github/workflows/update-opencode.yml b/.github/workflows/update-opencode.yml
index 6c3bd6d..e2c2af6 100644
--- a/.github/workflows/update-opencode.yml
+++ b/.github/workflows/update-opencode.yml
@@ -10,6 +10,7 @@ concurrency:
   cancel-in-progress: false
 
 permissions:
+  actions: write
   contents: write
   pull-requests: write
 
@@ -87,6 +88,17 @@ jobs:
             dependencies
             automated
 
+      # PRs created with GITHUB_TOKEN do not emit a pull_request event. Dispatch
+      # the required workflow explicitly against the exact update branch so its
+      # check/package-build contexts attach to the PR head SHA.
+      - name: Dispatch required checks
+        if: steps.check.outputs.update_needed == 'true' && steps.create-pr.outputs.pull-request-number
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh workflow run check.yml \
+            --ref "update-opencode-${{ steps.check.outputs.latest }}"
+
       - name: Enable auto-merge
         if: steps.check.outputs.update_needed == 'true' && steps.create-pr.outputs.pull-request-number
         env:
diff --git a/packages/opencode/package.nix b/packages/opencode/package.nix
index 680717f..54a51f1 100644
--- a/packages/opencode/package.nix
+++ b/packages/opencode/package.nix
@@ -21,7 +21,7 @@
 }:
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "opencode";
-  version = "1.17.13";
+  version = "1.18.3";
 
   __structuredAttrs = true;
   strictDeps = true;
@@ -30,7 +30,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     owner = "anomalyco";
     repo = "opencode";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-WE8+O+Od8M71fKoOOhE9CbTsJ0JMAi0ZajmYd//VG2k=";
+    hash = "sha256-Wdkzms59oHw3M/Em2RH7BPhZME8AtLmtNFSnsUxO1V4=";
   };
 
   node_modules = stdenvNoCC.mkDerivation {
@@ -85,7 +85,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
     # NOTE: Required else we get errors that our fixed-output derivation references store paths
     dontFixup = true;
 
-    outputHash = "sha256-SUNfdHtASPh1mpxKvIKJ2GrDHAxmv7Gu7B7vr3PX5W4=";
+    outputHash = "sha256-1NUtprMH8GnSUqQ+mHQSC+JLU7lwzHe6XXYHe129WmE=";
     outputHashAlgo = "sha256";
     outputHashMode = "recursive";
   };