diff --git a/.github/workflows/default.yml b/.github/workflows/default.yml
index 6e5d501ca..5faf0d438 100644
--- a/.github/workflows/default.yml
+++ b/.github/workflows/default.yml
@@ -15,9 +15,9 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-latest
         ocaml-compiler:
-          - 5.1.1
+          - 5.3.0
 
     runs-on: ${{ matrix.os }}
 
@@ -29,7 +29,7 @@ jobs:
         shell: bash
 
       - name: Use OCaml ${{ matrix.ocaml-compiler }}
-        uses: ocaml/setup-ocaml@v2
+        uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
 
@@ -46,7 +46,7 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-latest
 
     runs-on: ${{ matrix.os }}
 
@@ -69,9 +69,9 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-latest
         ocaml-compiler:
-          - 5.1.1
+          - 5.3.0
 
     runs-on: ${{ matrix.os }}
 
@@ -80,7 +80,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Use OCaml ${{ matrix.ocaml-compiler }}
-        uses: ocaml/setup-ocaml@v2
+        uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
 
@@ -110,9 +110,9 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-latest
         ocaml-compiler:
-          - 5.1.1
+          - 5.3.0
 
     runs-on: ${{ matrix.os }}
 
@@ -198,9 +198,9 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-latest
         ocaml-compiler:
-          - 5.1.1
+          - 5.3.0
 
     runs-on: ${{ matrix.os }}
 
@@ -236,7 +236,7 @@ jobs:
         shell: bash
 
       - name: Use OCaml ${{ matrix.ocaml-compiler }}
-        uses: ocaml/setup-ocaml@v2
+        uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}