diff --git a/build.gradle b/build.gradle
index a8144da..f6dae91 100644
--- a/build.gradle
+++ b/build.gradle
@@ -163,7 +163,7 @@ jar {
                 "Specification-Vendor"    : project.author,
                 "Specification-Version"   : "1",
                 "Implementation-Title"    : project.name,
-                "Implementation-Version"  : project.jar.archiveVersion,
+                "Implementation-Version"  : "1",
                 "Implementation-Vendor"   : project.author,
                 "Implementation-Timestamp": new Date().format("yyyy-MM-dd'T'HH:mm:ssZ"),
                 'MixinConfigs': "${modid}.mixins.json"