diff --git a/lib/modules/manager/npm/extract/__snapshots__/index.spec.ts.snap b/lib/modules/manager/npm/extract/__snapshots__/index.spec.ts.snap
index 19f1cfcec8761ca7241af43ea4f2e4879ccbd525..5d4c0f17c8bfb6010eb6199b28c81138498bb325 100644
--- a/lib/modules/manager/npm/extract/__snapshots__/index.spec.ts.snap
+++ b/lib/modules/manager/npm/extract/__snapshots__/index.spec.ts.snap
@@ -352,10 +352,46 @@ exports[`modules/manager/npm/extract/index .extractPackageFile() extracts npm pa
       "prettyDepType": "dependency",
     },
     {
-      "currentValue": "npm:foo",
+      "currentValue": "^1.2.3",
+      "datasource": "npm",
       "depName": "c",
       "depType": "dependencies",
       "npmPackageAlias": true,
+      "packageName": "c",
+      "prettyDepType": "dependency",
+    },
+    {
+      "currentValue": "1.2.3",
+      "datasource": "npm",
+      "depName": "d",
+      "depType": "dependencies",
+      "npmPackageAlias": true,
+      "packageName": "d",
+      "prettyDepType": "dependency",
+    },
+    {
+      "currentValue": "1.x.x",
+      "datasource": "npm",
+      "depName": "e",
+      "depType": "dependencies",
+      "npmPackageAlias": true,
+      "packageName": "e",
+      "prettyDepType": "dependency",
+    },
+    {
+      "currentValue": "foo",
+      "depName": "f",
+      "depType": "dependencies",
+      "npmPackageAlias": true,
+      "packageName": "f",
+      "prettyDepType": "dependency",
+      "skipReason": "unspecified-version",
+    },
+    {
+      "currentValue": "npm:@foo/@bar/@1.2.3",
+      "depName": "g",
+      "depType": "dependencies",
+      "npmPackageAlias": true,
       "prettyDepType": "dependency",
       "skipReason": "unspecified-version",
     },
diff --git a/lib/modules/manager/npm/extract/common/dependency.ts b/lib/modules/manager/npm/extract/common/dependency.ts
index c83b669d65dbd2dcba844b2f2c454845942478db..47575f75c8e24b2694f0047b47d940b1fe00f202 100644
--- a/lib/modules/manager/npm/extract/common/dependency.ts
+++ b/lib/modules/manager/npm/extract/common/dependency.ts
@@ -98,14 +98,19 @@ export function extractDependency(
   if (dep.currentValue.startsWith('npm:')) {
     dep.npmPackageAlias = true;
     const valSplit = dep.currentValue.replace('npm:', '').split('@');
-    if (valSplit.length === 2) {
+    if (valSplit.length === 1) {
+      dep.packageName = depName;
+      dep.currentValue = valSplit[0];
+    } else if (valSplit.length === 2) {
       dep.packageName = valSplit[0];
       dep.currentValue = valSplit[1];
     } else if (valSplit.length === 3) {
       dep.packageName = valSplit[0] + '@' + valSplit[1];
       dep.currentValue = valSplit[2];
     } else {
-      logger.debug('Invalid npm package alias: ' + dep.currentValue);
+      logger.debug(
+        `Invalid npm package alias for dependency: "${depName}":"${dep.currentValue}"`
+      );
     }
   }
   if (dep.currentValue.startsWith('file:')) {
diff --git a/lib/modules/manager/npm/extract/index.spec.ts b/lib/modules/manager/npm/extract/index.spec.ts
index 144e75d8ac1d23ce350bbaddb2a29e5ca5a6d03c..9c722b0e61a11cee06a783a593841c7ebe2083d1 100644
--- a/lib/modules/manager/npm/extract/index.spec.ts
+++ b/lib/modules/manager/npm/extract/index.spec.ts
@@ -761,7 +761,11 @@ describe('modules/manager/npm/extract/index', () => {
         dependencies: {
           a: 'npm:foo@1',
           b: 'npm:@foo/bar@1.2.3',
-          c: 'npm:foo',
+          c: 'npm:^1.2.3',
+          d: 'npm:1.2.3',
+          e: 'npm:1.x.x',
+          f: 'npm:foo',
+          g: 'npm:@foo/@bar/@1.2.3',
         },
       };
       const pJsonStr = JSON.stringify(pJson);
@@ -770,11 +774,28 @@ describe('modules/manager/npm/extract/index', () => {
         'package.json',
         defaultExtractConfig
       );
+      expect(logger.debug).toHaveBeenCalledWith(
+        'Invalid npm package alias for dependency: "g":"npm:@foo/@bar/@1.2.3"'
+      );
       expect(res).toMatchSnapshot({
         deps: [
           { packageName: 'foo' },
           { packageName: '@foo/bar' },
-          { depName: 'c' },
+          { packageName: 'c', currentValue: '^1.2.3' },
+          { packageName: 'd', currentValue: '1.2.3' },
+          { packageName: 'e', currentValue: '1.x.x' },
+          {
+            packageName: 'f',
+            currentValue: 'foo',
+            npmPackageAlias: true,
+            skipReason: 'unspecified-version',
+          },
+          {
+            depName: 'g',
+            currentValue: 'npm:@foo/@bar/@1.2.3',
+            npmPackageAlias: true,
+            skipReason: 'unspecified-version',
+          },
         ],
       });
     });