diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 632e97d..5a51a94 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -1,14 +1,3 @@
-# For most projects, this workflow file will not need changing; you simply need
-# to commit it to your repository.
-#
-# You may wish to alter this file to override the set of languages analyzed,
-# or to provide custom queries or build logic.
-#
-# ******** NOTE ********
-# We have attempted to detect the languages in your repository. Please check
-# the `language` matrix defined below to confirm you have the correct set of
-# supported CodeQL languages.
-#
 name: "CodeQL"
 
 on:
@@ -20,6 +9,14 @@ on:
   schedule:
     - cron: '24 7 * * 0'
 
+# Without these, init fails with "Resource not accessible by integration":
+# uploading results needs security-events: write, and the action reads workflow
+# metadata to correlate runs.
+permissions:
+  actions: read
+  contents: read
+  security-events: write
+
 jobs:
   analyze:
     name: Analyze
@@ -28,40 +25,20 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        language: [ 'javascript' ]
-        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
-        # Learn more:
-        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+        language: ['javascript-typescript']
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v2
-
-    # Initializes the CodeQL tools for scanning.
-    - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
-      with:
-        languages: ${{ matrix.language }}
-        # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file.
-        # Prefix the list here with "+" to use these queries and those in the config file.
-        # queries: ./path/to/local/query, your-org/your-repo/queries@main
-
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
-
-    # ℹ️ Command-line programs to run using the OS shell.
-    # 📚 https://git.io/JvXDl
+      - name: Checkout repository
+        uses: actions/checkout@v4
 
-    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
-    #    and modify them (or add more) to build your code if your project
-    #    uses a compiled language
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
 
-    #- run: |
-    #   make bootstrap
-    #   make release
+      # No Autobuild step: that exists for compiled languages (C/C++, C#, Java,
+      # Go). CodeQL extracts JS/TS straight from source, so building first buys
+      # nothing and adds a failure mode.
 
-    - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c378adc..91bee81 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -11,8 +11,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
+      # Pinned rather than `latest`: an unpinned toolchain means a bun release can
+      # break CI with no change of ours, which is how the decorator regression in
+      # 1.3.x first showed up here. Verified against 1.2.21 and 1.3.14.
       - uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: 1.3.14
       - run: bun install
       - run: bun typecheck
       - run: bun test
diff --git a/tsconfig.deno.json b/tsconfig.deno.json
index ac70923..c01d772 100644
--- a/tsconfig.deno.json
+++ b/tsconfig.deno.json
@@ -1,6 +1,13 @@
 {
   // === THIS IS THE DEFAULT DENO CONFIGURATION : https://deno.land/manual/getting_started/typescript
     "compilerOptions": {
+      // Also set in tsconfig.json, but it has to be here: bun (1.3.x) reads this
+      // option only from the base of an `extends` chain and ignores the child's
+      // value, so with it declared solely downstream, bun applied modern TC39
+      // decorator semantics to legacy decorators. mikro-orm's @PrimaryKey then
+      // received `undefined` as its target and the samples blew up under CI's
+      // bun while passing on 1.2.x. Harmless duplication for tsc.
+      "experimentalDecorators": true,
       "allowJs": false,
       "allowUmdGlobalAccess": false,
       "allowUnreachableCode": false,