diff --git a/contrib/OCSP_check/OCSP_check.sh b/contrib/OCSP_check/OCSP_check.sh
index e4fec83..ad1a420 100644
--- a/contrib/OCSP_check/OCSP_check.sh
+++ b/contrib/OCSP_check/OCSP_check.sh
@@ -7,7 +7,7 @@
 # OCSP server using the -port option to "openssl ocsp".
 
 # Full documentation and examples:
-# http://www.openssl.org/docs/apps/ocsp.html
+# https://docs.openssl.org/master/man1/openssl-ocsp/#openssl-ocsp
 
 
 # Edit the following values to suit your needs
diff --git a/doc/doxygen/doc_key_generation.h b/doc/doxygen/doc_key_generation.h
index d32f9d8..91c7a5a 100644
--- a/doc/doxygen/doc_key_generation.h
+++ b/doc/doxygen/doc_key_generation.h
@@ -95,11 +95,11 @@
  * to supply cryptographically strong pseudo-random data.  The following links
  * contain more information on this subject:
  * - For OpenSSL's \c RAND_bytes() function:
- *   http://www.openssl.org/docs/crypto/RAND_bytes.html
+ *   https://docs.openssl.org/master/man3/RAND_bytes/#rand_bytes
  * - For OpenSSL's pseudo-random number generating system:
- *   http://www.openssl.org/docs/crypto/rand.html
+ *   https://docs.openssl.org/master/man7/RAND/#rand
  * - For OpenSSL's support for external crypto modules:
- *   http://www.openssl.org/docs/crypto/engine.html
+ *   https://docs.openssl.org/master/man7/provider/#provider
  *
  * In mbed TLS, the Havege random number generator is used. For details, see
  * the mbed TLS documentation.