diff --git a/gradle.properties b/gradle.properties
index 6ed664ed..e6ab1580 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -5,7 +5,7 @@ org.gradle.jvmargs=-Xmx1G
 	# check these on https://fabricmc.net/use
     # or better: https://modmuss50.me/fabric.html
 	minecraft_version=1.15.1
-	yarn_mappings=1.15.1+build.1
+	yarn_mappings=1.15.1+build.17
 	loader_version=0.7.2+build.175
 
 # Mod Properties