diff --git a/doc/release.md b/doc/release.md
index ca35a86..9d95428 100644
--- a/doc/release.md
+++ b/doc/release.md
@@ -52,7 +52,7 @@ tag on the github mirror https://github.com/xiph/opusfile/releases
   to make sure you've included all the necessary libraries.
 - Upload the archive zipfile to websites.
 - Verify file permissions and that it's available at the expected URL.
-- Update links on <http://www.opus-codec.org/downloads/>.
+- Update links on <https://www.opus-codec.org/downloads/>.
 
 Binary releases are copied manually to s3 to appear at
 https://archive.mozilla.org/pub/mozilla.org/opus/win32/
diff --git a/src/http.c b/src/http.c
index a20718e..c52f0c0 100644
--- a/src/http.c
+++ b/src/http.c
@@ -564,7 +564,7 @@ static int op_parse_url_impl(OpusParsedURL *_dst,const char *_src){
   /*Discard the <fragment> component, if any.
     This doesn't get sent to the server.
     Some day we should add support for Media Fragment URIs
-     <http://www.w3.org/TR/media-frags/>.*/
+     <https://www.w3.org/TR/media-frags/>.*/
   if(*path_end=='#')uri_end=path_end+1+strspn(path_end+1,OP_URL_QUERY_FRAG);
   else uri_end=path_end;
   /*If there's anything left, this was not a valid URL.*/
diff --git a/src/wincerts.c b/src/wincerts.c
index 97b51f0..db51ba4 100644
--- a/src/wincerts.c
+++ b/src/wincerts.c
@@ -14,7 +14,7 @@
    in their bugtracker for over two years that implements this, without any
    action, so I'm giving up and re-implementing it locally.
 
-  [1] <http://rt.openssl.org/Ticket/Display.html?id=2158>*/
+  [1] <https://rt.openssl.org/Ticket/Display.html?id=2158>*/
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"