diff --git a/.github/actions/setup-build/action.yml b/.github/actions/setup-build/action.yml
index 4b85bd14..00d0a036 100644
--- a/.github/actions/setup-build/action.yml
+++ b/.github/actions/setup-build/action.yml
@@ -12,7 +12,7 @@ inputs:
   flint_version:
     description: FLINT version to build.
     required: false
-    default: '3.3.1'
+    default: '3.4.0'
 
 runs:
   using: composite