diff --git a/src/ruby/bin/interop/interop_client.rb b/src/ruby/bin/interop/interop_client.rb
old mode 100644
new mode 100755
index d0478bb4d1cd4c2abfc7b8120d7d01ee2fe63bac..718b0fdb83eb648066156e859a7aa5eb691509c3
--- a/src/ruby/bin/interop/interop_client.rb
+++ b/src/ruby/bin/interop/interop_client.rb
@@ -1,3 +1,5 @@
+#!/usr/bin/env ruby
+
 # Copyright 2014, Google Inc.
 # All rights reserved.
 #
@@ -27,7 +29,6 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#!/usr/bin/env ruby
 # interop_client is a testing tool that accesses a gRPC interop testing
 # server and runs a test on it.
 #
diff --git a/src/ruby/bin/interop/interop_server.rb b/src/ruby/bin/interop/interop_server.rb
old mode 100644
new mode 100755
index 53e271e80d5cc01511d5a045c095e1dd8fca6794..63071f3ec2e6efa7adbb5e91f751ecfeb23082c5
--- a/src/ruby/bin/interop/interop_server.rb
+++ b/src/ruby/bin/interop/interop_server.rb
@@ -1,3 +1,5 @@
+#!/usr/bin/env ruby
+
 # Copyright 2014, Google Inc.
 # All rights reserved.
 #
@@ -27,8 +29,6 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#!/usr/bin/env ruby
-#
 # interop_server is a Testing app that runs a gRPC interop testing server.
 #
 # It helps validate interoperation b/w gRPC in different environments
diff --git a/src/ruby/bin/math_client.rb b/src/ruby/bin/math_client.rb
old mode 100644
new mode 100755
index 5cba9317f4f5efefb01db97488b0b74b00626584..4df333d085d714c7fa2db94e3e692bcdffd34379
--- a/src/ruby/bin/math_client.rb
+++ b/src/ruby/bin/math_client.rb
@@ -1,3 +1,5 @@
+#!/usr/bin/env ruby
+
 # Copyright 2014, Google Inc.
 # All rights reserved.
 #
@@ -27,8 +29,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#!/usr/bin/env ruby
-#
+
 # Sample app that accesses a Calc service running on a Ruby gRPC server and
 # helps validate RpcServer as a gRPC server using proto2 serialization.
 #
diff --git a/src/ruby/bin/math_server.rb b/src/ruby/bin/math_server.rb
old mode 100644
new mode 100755
index a0f301c3e79d1138ca943671b7edc20fd6cc4098..0e47f71e6687fc252164b49f3056463c168431d2
--- a/src/ruby/bin/math_server.rb
+++ b/src/ruby/bin/math_server.rb
@@ -1,3 +1,5 @@
+#!/usr/bin/env ruby
+
 # Copyright 2014, Google Inc.
 # All rights reserved.
 #
@@ -27,8 +29,6 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#!/usr/bin/env ruby
-#
 # Sample gRPC Ruby server that implements the Math::Calc service and helps
 # validate GRPC::RpcServer as GRPC implementation using proto2 serialization.
 #
diff --git a/src/ruby/bin/noproto_client.rb b/src/ruby/bin/noproto_client.rb
old mode 100644
new mode 100755
index 50ae9fb68f899c55eb6618cdfb47eac35ff42e0f..34bdf545ee93f41669fd68d620187bac30499c4c
--- a/src/ruby/bin/noproto_client.rb
+++ b/src/ruby/bin/noproto_client.rb
@@ -1,3 +1,5 @@
+#!/usr/bin/env ruby
+
 # Copyright 2014, Google Inc.
 # All rights reserved.
 #
@@ -27,7 +29,6 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#!/usr/bin/env ruby
 # Sample app that helps validate RpcServer without protobuf serialization.
 #
 # Usage: $ ruby -S path/to/noproto_client.rb
diff --git a/src/ruby/bin/noproto_server.rb b/src/ruby/bin/noproto_server.rb
old mode 100644
new mode 100755
index d410827b22ddc7859dfd5c7f584d2fdf06cfdc70..1bdc192f0231d7100eb4c39b38cd07c5a30da6d6
--- a/src/ruby/bin/noproto_server.rb
+++ b/src/ruby/bin/noproto_server.rb
@@ -1,3 +1,5 @@
+#!/usr/bin/env ruby
+
 # Copyright 2014, Google Inc.
 # All rights reserved.
 #
@@ -27,7 +29,6 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#!/usr/bin/env ruby
 # Sample app that helps validate RpcServer without protobuf serialization.
 #
 # Usage: $ path/to/noproto_server.rb