diff --git a/CMakeLists.txt b/CMakeLists.txt
index 58e7202b..4a0a5cb7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,7 +63,7 @@ cmaize_find_or_build_optional_dependency(
     eigen
     ENABLE_EIGEN_SUPPORT
     URL https://www.gitlab.com/libeigen/eigen
-    VERSION 3.4.0
+    VERSION 2e76277bd049f7bec36b0f908c69734a42c5234f
     BUILD_TARGET eigen
     FIND_TARGET Eigen3::Eigen
 )