diff --git a/containers/dotnetcore-2.1-fsharp/.devcontainer/Dockerfile b/containers/dotnetcore-2.1-fsharp/.devcontainer/Dockerfile
index 47ecbe0911..77651150c8 100644
--- a/containers/dotnetcore-2.1-fsharp/.devcontainer/Dockerfile
+++ b/containers/dotnetcore-2.1-fsharp/.devcontainer/Dockerfile
@@ -18,7 +18,7 @@ RUN apt-get update \
     && apt-get -y install git procps lsb-release \
     #
     # Install F#
-    && apt-get install fsharp \
+    && apt-get install -y fsharp \
     #
     # Clean up
     && apt-get autoremove -y \
diff --git a/containers/dotnetcore-latest-fsharp/.devcontainer/Dockerfile b/containers/dotnetcore-latest-fsharp/.devcontainer/Dockerfile
index f924d5dca0..1403b586f2 100644
--- a/containers/dotnetcore-latest-fsharp/.devcontainer/Dockerfile
+++ b/containers/dotnetcore-latest-fsharp/.devcontainer/Dockerfile
@@ -18,7 +18,7 @@ RUN apt-get update \
     && apt-get -y install git procps lsb-release \
     #
     # Install F#
-    && apt-get install fsharp \
+    && apt-get install -y fsharp \
     #
     # Clean up
     && apt-get autoremove -y \
diff --git a/containers/ruby-2-rails-5/.devcontainer/devcontainer.json b/containers/ruby-2-rails-5/.devcontainer/devcontainer.json
index 3eb1b4e8d1..a7cb746e6c 100644
--- a/containers/ruby-2-rails-5/.devcontainer/devcontainer.json
+++ b/containers/ruby-2-rails-5/.devcontainer/devcontainer.json
@@ -1,13 +1,17 @@
 {
 	"name": "Ruby 2 Rails",
 	"dockerFile": "Dockerfile",
-	"extensions": [
-		"rebornix.Ruby", 
-	],
-	"runArgs": [], 
+
 	// Uncomment the next line if you want to publish any ports.
 	// "appPort": ["80:80"],
 
+	// Uncomment the next line if you want to add in default container specific settings.json values
+	// "settings":  { "workbench.colorTheme": "Quiet Light" },
+
 	// Uncomment the next line to run commands after the container is created.
-	// "postCreateCommand": "cd ${input:projectName} && bundle install"
+	// "postCreateCommand": "cd ${input:projectName} && bundle install",
+
+	"extensions": [
+		"rebornix.Ruby", 
+	]
 }
\ No newline at end of file
diff --git a/containers/ruby-2-sinatra/.devcontainer/devcontainer.json b/containers/ruby-2-sinatra/.devcontainer/devcontainer.json
index 4aa1a312e1..f693b77ebc 100644
--- a/containers/ruby-2-sinatra/.devcontainer/devcontainer.json
+++ b/containers/ruby-2-sinatra/.devcontainer/devcontainer.json
@@ -1,14 +1,17 @@
 {
 	"name": "Ruby 2 Sinatra",
 	"dockerFile": "Dockerfile",
-	"extensions": [
-		"rebornix.Ruby"
-	],
 
 	// Uncomment and edit the next line if you want to publish any ports.
 	// "appPort": ["4567:4567"]
 
+	// Uncomment the next line if you want to add in default container specific settings.json values
+	// "settings":  { "workbench.colorTheme": "Quiet Light" },
+
 	// Uncomment the next line to run commands after the container is created.
-	// "postCreateCommand": ""
+	// "postCreateCommand": "",
 
+	"extensions": [
+		"rebornix.Ruby"
+	]
 }
\ No newline at end of file