diff --git a/google-translate-core.el b/google-translate-core.el
index 11709e0..afc954d 100644
--- a/google-translate-core.el
+++ b/google-translate-core.el
@@ -74,10 +74,10 @@
   :group 'processes)
 
 (defvar google-translate-base-url
-  "http://translate.google.com/translate_a/single")
+  "https://translate.google.com/translate_a/single")
 
 (defvar google-translate-listen-url
-  "http://translate.google.com/translate_tts")
+  "https://translate.google.com/translate_tts")
 
 (defun google-translate--format-query-string (query-params)
   "Format QUERY-PARAMS as a query string.
diff --git a/google-translate-tk.el b/google-translate-tk.el
index 6a44d29..4a50adb 100644
--- a/google-translate-tk.el
+++ b/google-translate-tk.el
@@ -44,7 +44,7 @@
 (defvar google-translate--bit-v-len 32)
 
 (defvar google-translate--tkk-url
-  "http://translate.google.com/")
+  "https://translate.google.com/")
 
 (defvar google-translate--tkk-regex
   "TKK=eval('((function(){var\\s-+a\\\\x3d\\(-?[0-9]+\\);var\\s-+b\\\\x3d\\(-?[0-9]+\\);return\\s-+\\([0-9]+\\)"