6 files changed, 7 insertions, 7 deletions
diff --git a/lib/curl_des.c b/lib/curl_des.c
index 421c9f768..b123a00f0 100644
--- a/lib/curl_des.c
+++ b/lib/curl_des.c
@@ -34,7 +34,7 @@
  *
  * The function is a port of the Java based oddParity() function over at:
  *
- * http://davenport.sourceforge.net/ntlm.html
+ * https://davenport.sourceforge.io/ntlm.html
  *
  * Parameters:
  *
diff --git a/lib/curl_ntlm_core.c b/lib/curl_ntlm_core.c
index 73d983cf2..e8b763aac 100644
--- a/lib/curl_ntlm_core.c
+++ b/lib/curl_ntlm_core.c
@@ -27,7 +27,7 @@
 /*
  * NTLM details:
  *
- * http://davenport.sourceforge.net/ntlm.html
+ * https://davenport.sourceforge.io/ntlm.html
  * https://www.innovation.ch/java/ntlm.html
  */
 
diff --git a/lib/curl_ntlm_wb.c b/lib/curl_ntlm_wb.c
index 6a90e6236..9f5b87bc3 100644
--- a/lib/curl_ntlm_wb.c
+++ b/lib/curl_ntlm_wb.c
@@ -28,7 +28,7 @@
 /*
  * NTLM details:
  *
- * http://davenport.sourceforge.net/ntlm.html
+ * https://davenport.sourceforge.io/ntlm.html
  * https://www.innovation.ch/java/ntlm.html
  */
 
diff --git a/lib/http_ntlm.c b/lib/http_ntlm.c
index 21c77cd68..8a78bd293 100644
--- a/lib/http_ntlm.c
+++ b/lib/http_ntlm.c
@@ -27,7 +27,7 @@
 /*
  * NTLM details:
  *
- * http://davenport.sourceforge.net/ntlm.html
+ * https://davenport.sourceforge.io/ntlm.html
  * https://www.innovation.ch/java/ntlm.html
  */
 
diff --git a/lib/vauth/ntlm.c b/lib/vauth/ntlm.c
index b4d345d63..96861c935 100644
--- a/lib/vauth/ntlm.c
+++ b/lib/vauth/ntlm.c
@@ -27,7 +27,7 @@
 /*
  * NTLM details:
  *
- * http://davenport.sourceforge.net/ntlm.html
+ * https://davenport.sourceforge.io/ntlm.html
  * https://www.innovation.ch/java/ntlm.html
  */
 
@@ -651,7 +651,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
 
     /* A safer but less compatible alternative is:
      *   Curl_ntlm_core_lm_resp(ntbuffer, &ntlm->nonce[0], lmresp);
-     * See http://davenport.sourceforge.net/ntlm.html#ntlmVersion2 */
+     * See https://davenport.sourceforge.io/ntlm.html#ntlmVersion2 */
   }
 
   if(unicode) {
diff --git a/lib/vauth/ntlm.h b/lib/vauth/ntlm.h
index b14e7a56a..f906a3c7a 100644
--- a/lib/vauth/ntlm.h
+++ b/lib/vauth/ntlm.h
@@ -32,7 +32,7 @@
 /* Stuff only required for curl_ntlm_msgs.c */
 #ifdef BUILDING_CURL_NTLM_MSGS_C
 
-/* Flag bits definitions based on http://davenport.sourceforge.net/ntlm.html */
+/* Flag bits definitions based on https://davenport.sourceforge.io/ntlm.html */
 
 #define NTLMFLAG_NEGOTIATE_UNICODE               (1<<0)
 /* Indicates that Unicode strings are supported for use in security buffer