diff --git a/srcpkgs/gcsf/template b/srcpkgs/gcsf/template
index 201c3cbd299..57aa6857452 100644
--- a/srcpkgs/gcsf/template
+++ b/srcpkgs/gcsf/template
@@ -12,6 +12,11 @@ homepage="https://github.com/harababurel/gcsf"
 distfiles="https://github.com/harababurel/gcsf/archive/${version}.tar.gz"
 checksum=8bc7f94630eefda55ac8851a4071d7782385b711ea8f6313e2e64be05f686592
 
+pre_build() {
+	# cannot divide `usize` by `u32`
+	cargo update --package lexical-core:0.6.7 --precise 0.6.8
+}
+
 post_install() {
 	vlicense LICENSE
 }