diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 57d0345..676f572 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,7 +14,7 @@ env:
   # A fixed version used for testing, so that the builds don't
   # spontaneously break after a few years.
   # Make sure to update this from time to time.
-  RUST_VERSION: "1.72.0"
+  RUST_VERSION: "1.77.0"
 jobs:
   # Check formatting
   fmt: