diff --git a/index.js b/index.js
index dda2fe8a..33e6a3da 100644
--- a/index.js
+++ b/index.js
@@ -108,17 +108,36 @@ class ServerlessPythonRequirements {
       }
     };
 
-    const before = () =>
-      BbPromise.bind(this)
+    const before = () => {
+      if (
+        arguments[1].functionObj &&
+        arguments[1].functionObj.runtime &&
+        !arguments[1].functionObj.runtime.startsWith('python')
+      )
+        return;
+      return BbPromise.bind(this)
         .then(pipfileToRequirements)
         .then(addVendorHelper)
         .then(installAllRequirements)
         .then(packRequirements);
+    };
 
-    const after = () =>
-      BbPromise.bind(this)
+    const after = () => {
+      if (
+        arguments[1].functionObj &&
+        arguments[1].functionObj.runtime &&
+        !arguments[1].functionObj.runtime.startsWith('python')
+      )
+        return;
+      return BbPromise.bind(this)
         .then(removeVendorHelper)
-        .then(injectAllRequirements);
+        .then(() =>
+          injectAllRequirements.bind(this)(
+            arguments[1].functionObj &&
+              arguments[1].functionObj.package.artifact
+          )
+        );
+    };
 
     const invalidateCaches = () => {
       if (this.options.invalidateCaches) {
diff --git a/lib/inject.js b/lib/inject.js
index 1c10a615..337813a3 100644
--- a/lib/inject.js
+++ b/lib/inject.js
@@ -72,7 +72,7 @@ function moveModuleUp(source, target, module) {
  * Inject requirements into packaged application.
  * @return {Promise} the combined promise for requirements injection.
  */
-function injectAllRequirements() {
+function injectAllRequirements(funcArtifact) {
   this.serverless.cli.log('Injecting required Python packages to package...');
 
   if (this.options.zip) {
@@ -94,8 +94,11 @@ function injectAllRequirements() {
       })
       .map(func => {
         if (func.module !== '.') {
-          const artifact = func.package.artifact;
-          const newArtifact = path.join('.serverless', `${func.module}.zip`);
+          const artifact = func.package ? func.package.artifact : funcArtifact;
+          const newArtifact = path.join(
+            '.serverless',
+            `${func.module}-${func.name}.zip`
+          );
           func.package.artifact = newArtifact;
           return moveModuleUp(artifact, newArtifact, func.module).then(
             () => func
@@ -114,7 +117,7 @@ function injectAllRequirements() {
   } else {
     return injectRequirements(
       path.join('.serverless', 'requirements'),
-      this.serverless.service.package.artifact,
+      this.serverless.service.package.artifact || funcArtifact,
       this.options
     );
   }
diff --git a/lib/pip.js b/lib/pip.js
index a5647d84..fc8a08a6 100644
--- a/lib/pip.js
+++ b/lib/pip.js
@@ -201,29 +201,35 @@ function installAllRequirements() {
   fse.ensureDirSync(path.join(this.servicePath, '.serverless'));
   if (this.serverless.service.package.individually) {
     let doneModules = [];
-    values(this.serverless.service.functions).forEach(f => {
-      if (!get(f, 'module')) {
-        set(f, ['module'], '.');
-      }
-      if (!doneModules.includes(f.module)) {
-        installRequirements(
-          path.join(f.module, this.options.fileName),
-          path.join('.serverless', f.module),
-          this.serverless,
-          this.servicePath,
-          this.options
-        );
-        if (f.vendor) {
-          // copy vendor libraries to requirements folder
-          copyVendors(
-            f.vendor,
+    values(this.serverless.service.functions)
+      .filter(func =>
+        (func.runtime || this.serverless.service.provider.runtime).match(
+          /^python.*/
+        )
+      )
+      .map(f => {
+        if (!get(f, 'module')) {
+          set(f, ['module'], '.');
+        }
+        if (!doneModules.includes(f.module)) {
+          installRequirements(
+            path.join(f.module, this.options.fileName),
             path.join('.serverless', f.module),
-            this.serverless
+            this.serverless,
+            this.servicePath,
+            this.options
           );
+          if (f.vendor) {
+            // copy vendor libraries to requirements folder
+            copyVendors(
+              f.vendor,
+              path.join('.serverless', f.module),
+              this.serverless
+            );
+          }
+          doneModules.push(f.module);
         }
-        doneModules.push(f.module);
-      }
-    });
+      });
   } else {
     installRequirements(
       this.options.fileName,
diff --git a/test.bats b/test.bats
index 49093fcc..b4b6a237 100755
--- a/test.bats
+++ b/test.bats
@@ -197,8 +197,8 @@ teardown() {
     cd tests/individually
     npm i $(npm pack ../..)
     sls package
-    unzip .serverless/module1.zip -d puck
-    unzip .serverless/module2.zip -d puck2
+    unzip .serverless/module1-sls-py-req-test-indiv-dev-hello1.zip -d puck
+    unzip .serverless/module2-sls-py-req-test-indiv-dev-hello2.zip -d puck2
     ls puck/handler1.py
     ls puck2/handler2.py
     ls puck/pyaml
diff --git a/tests/base/package.json b/tests/base/package.json
index c53d13ee..1130d4b8 100644
--- a/tests/base/package.json
+++ b/tests/base/package.json
@@ -9,6 +9,6 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "serverless-python-requirements": "file:serverless-python-requirements-4.0.0.tgz"
+    "serverless-python-requirements": "file:serverless-python-requirements-4.0.2.tgz"
   }
 }