diff --git a/package.json b/package.json
index 78f0174e7..ee9e0cd67 100644
--- a/package.json
+++ b/package.json
@@ -63,6 +63,7 @@
     "@types/minimatch": "3.0.3",
     "@types/node": "12.6.2",
     "@types/request": "2.48.2",
+    "@types/semver": "6.0.1",
     "@typescript-eslint/eslint-plugin": "1.12.0",
     "@verdaccio/babel-preset": "0.2.1",
     "@verdaccio/eslint-config": "0.0.1",
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index e19f41cd9..1bc0ff545 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -263,16 +263,20 @@ export function parseAddress(urlAddress: any): any {
  * @return {Array} sorted Array
  */
 export function semverSort(listVersions: string[]): string[] {
-  return listVersions
-    .filter(function(x): boolean {
-      if (!semver.parse(x, true)) {
-        Logger.logger.warn({ ver: x }, 'ignoring bad version @{ver}');
-        return false;
-      }
-      return true;
-    })
-    .sort(semver.compareLoose)
-    .map(String);
+  return (
+    listVersions
+      .filter(function(x): boolean {
+        if (!semver.parse(x, true)) {
+          Logger.logger.warn({ ver: x }, 'ignoring bad version @{ver}');
+          return false;
+        }
+        return true;
+      })
+      // FIXME: it seems the @types/semver do not handle a legitimate method named 'compareLoose'
+      // @ts-ignore
+      .sort(semver.compareLoose)
+      .map(String)
+  );
 }
 
 /**
diff --git a/yarn.lock b/yarn.lock
index f1478dc6c..49b27947e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1461,6 +1461,11 @@
     "@types/tough-cookie" "*"
     form-data "^2.5.0"
 
+"@types/semver@6.0.1":
+  version "6.0.1"
+  resolved "https://registry.verdaccio.org/@types%2fsemver/-/semver-6.0.1.tgz#a984b405c702fa5a7ec6abc56b37f2ba35ef5af6"
+  integrity sha512-ffCdcrEE5h8DqVxinQjo+2d1q+FV5z7iNtPofw3JsrltSoSVlOGaW0rY8XxtO9XukdTn8TaCGWmk2VFGhI70mg==
+
 "@types/serve-static@*":
   version "1.13.2"
   resolved "https://registry.verdaccio.org/@types%2fserve-static/-/serve-static-1.13.2.tgz#f5ac4d7a6420a99a6a45af4719f4dcd8cd907a48"