diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5dbce677..4520c311 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        otp: ['21.3', '25.3', '26']
+        otp: [21, 25, 26, 27]
     runs-on: ubuntu-22.04
     container:
       image: erlang:${{ matrix.otp }}
@@ -39,7 +39,7 @@ jobs:
         path: .ejabberd-modules/sources/ejabberd-contrib
 
     - name: Get a compatible Rebar3
-      if: matrix.otp <= '21.3'
+      if: matrix.otp <= 21
       run: |
         rm rebar3
         wget https://github.com/processone/ejabberd/raw/21.12/rebar3
@@ -105,7 +105,7 @@ jobs:
       run: sed -i '/mod_captcha_rust/d' modules_available.txt
 
     - name: Disable mod_s3_upload testing with old OTP
-      if: matrix.otp < '25'
+      if: matrix.otp < 25
       run: sed -i '/mod_s3_upload/d' modules_available.txt
 
     - name: Install modules