diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index af83312d..74aa1e33 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -79,7 +79,7 @@ jobs:
         with:
           kind: msrv
           tools: cargo-msrv
-          toolchain: 1.74.0 # needed for cargo-msrv due to clap_lex v0.7.2
+          toolchain: 1.78.0 # needed for cargo-msrv
       - name: Check msrv
         shell: sh
         run: for crate in "derive" "generator" "grammars" "meta" "pest" "vm"; do cd "$crate" && cargo msrv verify && cd ..; done