diff --git a/srcpkgs/scryer-prolog/template b/srcpkgs/scryer-prolog/template
index 3868993d0dd..6be96f9ebde 100644
--- a/srcpkgs/scryer-prolog/template
+++ b/srcpkgs/scryer-prolog/template
@@ -19,6 +19,10 @@ case "$XBPS_TARGET_MACHINE" in
 	*) broken="ftbfs in ring" ;;
 esac
 
+post_patch() {
+	cargo update --package lexical-core:0.4.6 --precise 0.4.8
+}
+
 post_install() {
 	vlicense LICENSE
 }