diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index df154ee..1b5c8d6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        otp_version: ['26.2', '25.3']
+        otp_version: ['27.1', '26.2', '25.3']
 
     steps:
       - uses: actions/checkout@v4
@@ -40,7 +40,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        otp_version: ['26.2', '25.3']
+        otp_version: ['27.1', '26.2', '25.3']
 
     needs:
       - build
diff --git a/.tool-versions b/.tool-versions
index c1140d3..a7ec022 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-erlang 26.2.5.2
+erlang 27.1.1