diff --git a/db/.ruby-version b/db/.ruby-version
index abf2ccea0..cb506813e 100644
--- a/db/.ruby-version
+++ b/db/.ruby-version
@@ -1 +1 @@
-ruby-2.0.0-p247
+2.0.0-p247
diff --git a/pb/.ruby-version b/pb/.ruby-version
index abf2ccea0..cb506813e 100644
--- a/pb/.ruby-version
+++ b/pb/.ruby-version
@@ -1 +1 @@
-ruby-2.0.0-p247
+2.0.0-p247
diff --git a/ruby/.ruby-version b/ruby/.ruby-version
index abf2ccea0..cb506813e 100644
--- a/ruby/.ruby-version
+++ b/ruby/.ruby-version
@@ -1 +1 @@
-ruby-2.0.0-p247
+2.0.0-p247
diff --git a/web/.ruby-version b/web/.ruby-version
index abf2ccea0..cb506813e 100644
--- a/web/.ruby-version
+++ b/web/.ruby-version
@@ -1 +1 @@
-ruby-2.0.0-p247
+2.0.0-p247
diff --git a/websocket-gateway/.ruby-version b/websocket-gateway/.ruby-version
index abf2ccea0..cb506813e 100644
--- a/websocket-gateway/.ruby-version
+++ b/websocket-gateway/.ruby-version
@@ -1 +1 @@
-ruby-2.0.0-p247
+2.0.0-p247