9 files changed, 9 insertions, 0 deletions
diff --git a/lib/uri/common.rb b/lib/uri/common.rb
index 28b5c99789..4c7d112e61 100644
--- a/lib/uri/common.rb
+++ b/lib/uri/common.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # = uri/common.rb
 #
diff --git a/lib/uri/ftp.rb b/lib/uri/ftp.rb
index a90e9b20fd..e5c00b34da 100644
--- a/lib/uri/ftp.rb
+++ b/lib/uri/ftp.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # = uri/ftp.rb
 #
 # Author:: Akira Yamada <akira@ruby-lang.org>
diff --git a/lib/uri/http.rb b/lib/uri/http.rb
index dc47613cdf..d43e9a28e0 100644
--- a/lib/uri/http.rb
+++ b/lib/uri/http.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # = uri/http.rb
 #
 # Author:: Akira Yamada <akira@ruby-lang.org>
diff --git a/lib/uri/https.rb b/lib/uri/https.rb
index 7d242e7e79..3c8c905cc3 100644
--- a/lib/uri/https.rb
+++ b/lib/uri/https.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # = uri/https.rb
 #
 # Author:: Akira Yamada <akira@ruby-lang.org>
diff --git a/lib/uri/ldap.rb b/lib/uri/ldap.rb
index 56d748e59e..4345875e28 100644
--- a/lib/uri/ldap.rb
+++ b/lib/uri/ldap.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # = uri/ldap.rb
 #
 # Author::
diff --git a/lib/uri/ldaps.rb b/lib/uri/ldaps.rb
index 42bbfe86ba..d03f8efa2d 100644
--- a/lib/uri/ldaps.rb
+++ b/lib/uri/ldaps.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # = uri/ldap.rb
 #
 # License:: You can redistribute it and/or modify it under the same term as Ruby.
diff --git a/lib/uri/mailto.rb b/lib/uri/mailto.rb
index b4405630a9..495f939a3b 100644
--- a/lib/uri/mailto.rb
+++ b/lib/uri/mailto.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 # = uri/mailto.rb
 #
 # Author:: Akira Yamada <akira@ruby-lang.org>
diff --git a/lib/uri/rfc2396_parser.rb b/lib/uri/rfc2396_parser.rb
index a8af37502a..b9e7b2b26e 100644
--- a/lib/uri/rfc2396_parser.rb
+++ b/lib/uri/rfc2396_parser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 #--
 # = uri/common.rb
 #
diff --git a/lib/uri/rfc3986_parser.rb b/lib/uri/rfc3986_parser.rb
index 3923b0699c..871280044a 100644
--- a/lib/uri/rfc3986_parser.rb
+++ b/lib/uri/rfc3986_parser.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 module URI
   class RFC3986_Parser # :nodoc:
     # URI defined in RFC3986