diff --git a/.github/workflows/docker-image.yml b/.github/workflows/semantic-release.yml
similarity index 79%
rename from .github/workflows/docker-image.yml
rename to .github/workflows/semantic-release.yml
index 78f6ac7..a8de028 100644
--- a/.github/workflows/docker-image.yml
+++ b/.github/workflows/semantic-release.yml
@@ -1,4 +1,4 @@
-name: Docker Image CI
+name: CI
 
 on:
   push:
@@ -23,7 +23,7 @@ jobs:
 
     - name: Build the Docker image
       run: docker build -t dustico/dusti-lock:${{ steps.semantic_release_info.outputs.git_tag }} .
-      
+
     - name: Tag version
       run: |
         git config --local user.email "action@github.com"
@@ -46,13 +46,3 @@ jobs:
         body: ${{ steps.semantic_release_info.outputs.notes }}
         draft: false
         prerelease: false
-        
-    - name: Docker login
-      env:
-        DOCKER_USER: ${{secrets.DOCKER_USER}}
-        DOCKER_PASSWORD: ${{secrets.DOCKER_PASSWORD}}
-      run: |
-        docker login -u $DOCKER_USER -p $DOCKER_PASSWORD 
-      
-    - name: Docker push
-      run: docker push dustico/dusti-lock
diff --git a/.gitignore b/.gitignore
index b3cb0b6..3cc7914 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 dusti-lock
-.idea
\ No newline at end of file
+.idea
+tests
\ No newline at end of file
diff --git a/analysis/analysis.go b/analysis/analysis.go
index 28f4a56..27b281f 100644
--- a/analysis/analysis.go
+++ b/analysis/analysis.go
@@ -89,6 +89,7 @@ func AnalyzeDirectoryRecursive(workingDir string, excludedDirectories map[string
 
 		fileName := fileInfo.Name()
 		if fileName == "package.json" {
+			fmt.Printf("scanning \"%v\"\n", path)
 			result, err := AnalyzePackagesJsonFile(path)
 			if result {
 				hasAnyPackageAvailableForRegistration = true
diff --git a/dependencies/dependencies.go b/dependencies/dependencies.go
index 850eaf6..c161bb0 100644
--- a/dependencies/dependencies.go
+++ b/dependencies/dependencies.go
@@ -77,12 +77,12 @@ func ParsePackagesJsonFile(reader *bufio.Reader) ([]string, error) {
 		return nil, err
 	}
 
-	processPackageName := func(npmPackageName string) {
+	processPackageName := func(dict *map[string]interface{}, npmPackageName string) {
 		if strings.HasPrefix(npmPackageName, "@") {
 			return
 		}
 
-		value, _ := (*t.Dependencies)[npmPackageName]
+		value, _ := (*dict)[npmPackageName]
 		version := fmt.Sprintf("%v", value)
 		version = strings.ToLower(version)
 
@@ -99,13 +99,13 @@ func ParsePackagesJsonFile(reader *bufio.Reader) ([]string, error) {
 
 	if t.Dependencies != nil {
 		for npmPackageName := range *t.Dependencies {
-			processPackageName(npmPackageName)
+			processPackageName(t.Dependencies, npmPackageName)
 		}
 	}
 
 	if t.DevDependencies != nil {
 		for npmPackageName := range *t.DevDependencies {
-			processPackageName(npmPackageName)
+			processPackageName(t.DevDependencies, npmPackageName)
 		}
 	}
 
diff --git a/registry/registry.go b/registry/registry.go
index c51bac7..2b4715b 100644
--- a/registry/registry.go
+++ b/registry/registry.go
@@ -13,14 +13,42 @@ const userAgent = "dependency locker"
 const npmRegistryUrl = "https://registry.npmjs.org"
 const pypiRegistryUrl = "https://pypi.python.org/simple"
 
+var cache map[string]bool
+
+func init() {
+	cache = map[string]bool{}
+}
+
 func IsPypiPackageAvailableForRegistration(packageName string) (bool, error) {
 	url := fmt.Sprintf("%v/%v", pypiRegistryUrl, packageName)
-	return isPackageAvailableForRegistration(url)
+
+	result, found := cache[url]
+	if found {
+		return result, nil
+	}
+
+	result, err := isPackageAvailableForRegistration(url)
+	if err != nil {
+		cache[url] = result
+	}
+
+	return result, err
 }
 
 func IsNpmPackageAvailableForRegistration(packageName string) (bool, error) {
 	url := fmt.Sprintf("%v/%v", npmRegistryUrl, packageName)
-	return isPackageAvailableForRegistration(url)
+
+	result, found := cache[url]
+	if found {
+		return result, nil
+	}
+
+	result, err := isPackageAvailableForRegistration(url)
+	if err != nil {
+		cache[url] = result
+	}
+
+	return result, err
 }
 
 func isPackageAvailableForRegistration(url string) (bool, error) {