diff --git a/bin/rbenv-bundler-ruby-version b/bin/rbenv-bundler-ruby-version
index c42906e..8da7e77 100755
--- a/bin/rbenv-bundler-ruby-version
+++ b/bin/rbenv-bundler-ruby-version
@@ -29,7 +29,7 @@ version_from_gemfile() {
         -e 's/engine:/:engine =>/' -e 's/engine_version:/:engine_version =>/' \
         -e "s/.*:engine *=> *['\"]\([^'\"]*\).*:engine_version *=> *['\"]\([^'\"]*\).*/\1-\2/" \
         -e "s/.*:engine_version *=> *['\"]\([^'\"]*\).*:engine *=> *['\"]\([^'\"]*\).*/\2-\1/" \
-        -e "s/ *ruby ['\"]\([^'\"]*\).*/\1/" |
+        -e "s/ *ruby *['\"]\([^'\"]*\).*/\1/" |
     head -1
 }
 
diff --git a/test/bundler-ruby-version.bats b/test/bundler-ruby-version.bats
index b6d1821..ddd8de3 100644
--- a/test/bundler-ruby-version.bats
+++ b/test/bundler-ruby-version.bats
@@ -13,7 +13,7 @@ load test_helper
 @test 'Recognize simple ruby version in single quotes with leading spaces' {
   mkdir -p "$EXAMPLE_APP_DIR"
   cd "$EXAMPLE_APP_DIR"
-  echo "  ruby '1.2.3'" > "$EXAMPLE_APP_DIR/Gemfile"
+  echo "  ruby  '1.2.3'" > "$EXAMPLE_APP_DIR/Gemfile"
   run rbenv bundler-ruby-version
   assert_success '1.2.3'
 }