diff --git a/crypto/openssl/include/openssl/opensslv.h b/crypto/openssl/include/openssl/opensslv.h
--- a/crypto/openssl/include/openssl/opensslv.h
+++ b/crypto/openssl/include/openssl/opensslv.h
@@ -29,7 +29,7 @@
  */
 # define OPENSSL_VERSION_MAJOR  3
 # define OPENSSL_VERSION_MINOR  0
-# define OPENSSL_VERSION_PATCH  14
+# define OPENSSL_VERSION_PATCH  15
 
 /*
  * Additional version information
@@ -74,21 +74,21 @@
  * longer variant with OPENSSL_VERSION_PRE_RELEASE_STR and
  * OPENSSL_VERSION_BUILD_METADATA_STR appended.
  */
-# define OPENSSL_VERSION_STR "3.0.14"
-# define OPENSSL_FULL_VERSION_STR "3.0.14"
+# define OPENSSL_VERSION_STR "3.0.15"
+# define OPENSSL_FULL_VERSION_STR "3.0.15"
 
 /*
  * SECTION 3: ADDITIONAL METADATA
  *
  * These strings are defined separately to allow them to be parsable.
  */
-# define OPENSSL_RELEASE_DATE "4 Jun 2024"
+# define OPENSSL_RELEASE_DATE "3 Sep 2024"
 
 /*
  * SECTION 4: BACKWARD COMPATIBILITY
  */
 
-# define OPENSSL_VERSION_TEXT "OpenSSL 3.0.14 4 Jun 2024"
+# define OPENSSL_VERSION_TEXT "OpenSSL 3.0.15 3 Sep 2024"
 
 /* Synthesize OPENSSL_VERSION_NUMBER with the layout 0xMNN00PPSL */
 # ifdef OPENSSL_VERSION_PRE_RELEASE
diff --git a/secure/lib/libcrypto/Makefile.inc b/secure/lib/libcrypto/Makefile.inc
--- a/secure/lib/libcrypto/Makefile.inc
+++ b/secure/lib/libcrypto/Makefile.inc
@@ -1,8 +1,8 @@
 .include <bsd.own.mk>
 
 # OpenSSL version used for manual page generation
-OPENSSL_VER=	3.0.14
-OPENSSL_DATE=	2024-06-04
+OPENSSL_VER=	3.0.15
+OPENSSL_DATE=	2024-09-03
 
 LCRYPTO_SRC=	${SRCTOP}/crypto/openssl
 LCRYPTO_DOC=	${LCRYPTO_SRC}/doc