diff --git a/step1/Dockerfile b/step1/Dockerfile
index fafe320..e86f8c2 100644
--- a/step1/Dockerfile
+++ b/step1/Dockerfile
@@ -1,4 +1,4 @@
-FROM       python
+FROM       python:3
 LABEL      maintainer="Sawood Alam <@ibnesayeed>"
 
 RUN        pip install beautifulsoup4
diff --git a/step2/Dockerfile b/step2/Dockerfile
index fafe320..e86f8c2 100644
--- a/step2/Dockerfile
+++ b/step2/Dockerfile
@@ -1,4 +1,4 @@
-FROM       python
+FROM       python:3
 LABEL      maintainer="Sawood Alam <@ibnesayeed>"
 
 RUN        pip install beautifulsoup4
diff --git a/step3/Dockerfile b/step3/Dockerfile
index 410bcbf..7c3e5d1 100644
--- a/step3/Dockerfile
+++ b/step3/Dockerfile
@@ -1,4 +1,4 @@
-FROM       python
+FROM       python:3
 LABEL      maintainer="Sawood Alam <@ibnesayeed>"
 
 WORKDIR    /app
diff --git a/step4/api/Dockerfile b/step4/api/Dockerfile
index 410bcbf..7c3e5d1 100644
--- a/step4/api/Dockerfile
+++ b/step4/api/Dockerfile
@@ -1,4 +1,4 @@
-FROM       python
+FROM       python:3
 LABEL      maintainer="Sawood Alam <@ibnesayeed>"
 
 WORKDIR    /app
diff --git a/step5/api/Dockerfile b/step5/api/Dockerfile
index 410bcbf..7c3e5d1 100644
--- a/step5/api/Dockerfile
+++ b/step5/api/Dockerfile
@@ -1,4 +1,4 @@
-FROM       python
+FROM       python:3
 LABEL      maintainer="Sawood Alam <@ibnesayeed>"
 
 WORKDIR    /app
diff --git a/step6/api/Dockerfile b/step6/api/Dockerfile
index 4c099f3..a209ab0 100644
--- a/step6/api/Dockerfile
+++ b/step6/api/Dockerfile
@@ -1,4 +1,4 @@
-FROM       ruby
+FROM       ruby:2
 LABEL      maintainer="Sawood Alam <@ibnesayeed>"
 
 ENV        LANG C.UTF-8