diff --git a/build/makefile_base.mak b/build/makefile_base.mak
index 74b8df64..4f0b8edd 100644
--- a/build/makefile_base.mak
+++ b/build/makefile_base.mak
@@ -190,7 +190,7 @@ GECKO_VER := 2.47.2
 GECKO32_TARBALL := wine-gecko-$(GECKO_VER)-x86.tar.xz
 GECKO64_TARBALL := wine-gecko-$(GECKO_VER)-x86_64.tar.xz
 
-WINEMONO_VER := 6.3.0
+WINEMONO_VER := 6.4.1
 WINEMONO_TARBALL := wine-mono-$(WINEMONO_VER)-x86.tar.xz
 
 FONTS := $(SRCDIR)/fonts