diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 03d14fb..8415bc1 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,19 +12,21 @@ on:
 jobs:
 
   linux:
-    name: "Ubuntu 20.04 + PostgreSQL ${{matrix.PGVER}}"
-    runs-on: ubuntu-20.04
+    name: "Ubuntu + PostgreSQL ${{matrix.PGVER}}"
+    runs-on: ubuntu-latest
     strategy:
       matrix:
-        PGVER: [10, 11, 12, 13, 14]
+        PGVER: [14, 15, 16, 17, 18]
     steps:
       - name: "Checkout"
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: "InstallDB"
         run: |
           echo "::group::apt-get-update"
-          echo "deb http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg main ${{matrix.PGVER}}" \
+          sudo install -d /etc/apt/keyrings
+          curl -fsSL https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo gpg --dearmor -o /etc/apt/keyrings/postgresql.gpg
+          echo "deb [signed-by=/etc/apt/keyrings/postgresql.gpg] http://apt.postgresql.org/pub/repos/apt/ $(lsb_release -cs)-pgdg main ${{matrix.PGVER}}" \
           | sudo tee /etc/apt/sources.list.d/pgdg.list
           sudo -nH apt-get -q update
           echo "::endgroup::"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d58f2f5..8ca9048 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,7 +13,7 @@ jobs:
 
       - name: Checkout code
         id: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Build tarball
         id: build
@@ -28,25 +28,10 @@ jobs:
           echo "TGZ=${EXTENSION}-${EXT_VERSION}.tar.gz" >> $GITHUB_ENV
 
       - name: Create release
-        id: release
-        uses: actions/create-release@v1
         env:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
-        with:
-          tag_name: ${{github.ref}}
-          release_name: ${{github.event.repository.name}} v${{env.EXT_VERSION}}
-          body_path: docs/notes/v${{env.EXT_VERSION}}.md
-          draft: false
-          prerelease: false
-
-      - name: Upload source
-        id: upload
-        uses: actions/upload-release-asset@v1
-        env:
-          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
-        with:
-          upload_url: ${{steps.release.outputs.upload_url}}
-          asset_path: ${{env.TGZ}}
-          asset_name: ${{env.TGZ}}
-          asset_content_type: application/x-gzip
+        run: |
+          gh release create "${{github.ref}}" "${{env.TGZ}}" \
+            --title "${{github.event.repository.name}} v${{env.EXT_VERSION}}" \
+            --notes-file "docs/notes/v${{env.EXT_VERSION}}.md"
 
diff --git a/expected/londiste_create_part.out b/expected/londiste_create_part.out
index a65b12d..cd6fcc1 100644
--- a/expected/londiste_create_part.out
+++ b/expected/londiste_create_part.out
@@ -48,7 +48,7 @@ select count(*) from pg_indexes where schemaname='public' and tablename = 'event
      2
 (1 row)
 
-select count(*) from pg_constraint where conrelid = 'public.events_2011_01'::regclass;
+select count(*) from pg_constraint where conrelid = 'public.events_2011_01'::regclass and contype != 'n';
  count 
 -------
      3
diff --git a/expected/londiste_create_part_1.out b/expected/londiste_create_part_1.out
index f2835ab..9383954 100644
--- a/expected/londiste_create_part_1.out
+++ b/expected/londiste_create_part_1.out
@@ -48,7 +48,7 @@ select count(*) from pg_indexes where schemaname='public' and tablename = 'event
      2
 (1 row)
 
-select count(*) from pg_constraint where conrelid = 'public.events_2011_01'::regclass;
+select count(*) from pg_constraint where conrelid = 'public.events_2011_01'::regclass and contype != 'n';
  count 
 -------
      3
diff --git a/sql/londiste_create_part.sql b/sql/londiste_create_part.sql
index f725cf2..d1306ab 100644
--- a/sql/londiste_create_part.sql
+++ b/sql/londiste_create_part.sql
@@ -42,7 +42,7 @@ select londiste.create_partition('events', 'events_2011_01', 'id', 'ctime', '201
 select londiste.create_partition('events', 'events_2011_01', 'id', 'ctime', '2011-01-01'::timestamp, 'month');
 
 select count(*) from pg_indexes where schemaname='public' and tablename = 'events_2011_01';
-select count(*) from pg_constraint where conrelid = 'public.events_2011_01'::regclass;
+select count(*) from pg_constraint where conrelid = 'public.events_2011_01'::regclass and contype != 'n';
 select count(*) from pg_rules where schemaname = 'public' and tablename = 'events_2011_01';
 select trigger_name, event_manipulation, action_statement
     from information_schema.triggers