diff --git a/src/main/java/com/googlesource/gerrit/plugins/manager/repository/CorePluginsRepository.java b/src/main/java/com/googlesource/gerrit/plugins/manager/repository/CorePluginsRepository.java
index 8e96e6a..d766281 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/manager/repository/CorePluginsRepository.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/manager/repository/CorePluginsRepository.java
@@ -82,7 +82,11 @@
                 pluginUrl.toString());
           }
           return new PluginInfo(
-              entryName.getFileName().toString(), "", "", "", pluginUrl.toString());
+              dropSuffix(entryName.getFileName().toString(), ".jar"),
+              "",
+              "",
+              "",
+              pluginUrl.toString());
         } catch (IOException e) {
           log.error("Unable to open plugin " + pluginUrl, e);
           return null;
@@ -93,6 +97,12 @@
       }
     }
 
+    private String dropSuffix(String string, String suffix) {
+      return string.endsWith(suffix)
+          ? string.substring(0, string.length() - suffix.length())
+          : string;
+    }
+
     private Manifest getManifestEntry(JarInputStream pluginJar) throws IOException {
       for (JarEntry entry = pluginJar.getNextJarEntry();
           entry != null;