diff --git a/.actions/build-linux-openssl3-clang b/.actions/build-linux-openssl3-clang
index e0151ddc..4b805793 100755
--- a/.actions/build-linux-openssl3-clang
+++ b/.actions/build-linux-openssl3-clang
@@ -12,8 +12,8 @@ FAKEROOT="$(mktemp -d)"
 # Check exports.
 (cd src && ./diff_exports.sh)
 
-# Build and install OpenSSL 3.0.14.
-git clone --branch openssl-3.0.14 \
+# Build and install OpenSSL 3.0.15.
+git clone --branch openssl-3.0.15 \
 	--depth=1 https://github.com/openssl/openssl
 cd openssl
 ./Configure linux-x86_64-clang --prefix="${FAKEROOT}" \
diff --git a/.actions/build-linux-openssl3-gcc b/.actions/build-linux-openssl3-gcc
index 81f53089..91ccd48f 100755
--- a/.actions/build-linux-openssl3-gcc
+++ b/.actions/build-linux-openssl3-gcc
@@ -8,8 +8,8 @@
 ${CC} --version
 FAKEROOT="$(mktemp -d)"
 
-# Build and install OpenSSL 3.0.14.
-git clone --branch openssl-3.0.14 \
+# Build and install OpenSSL 3.0.15.
+git clone --branch openssl-3.0.15 \
 	--depth=1 https://github.com/openssl/openssl
 cd openssl
 ./Configure linux-x86_64 --prefix="${FAKEROOT}" \
diff --git a/.actions/build-linux-openssl3-i686-w64-mingw32-gcc b/.actions/build-linux-openssl3-i686-w64-mingw32-gcc
index f926785e..ff270b0a 100755
--- a/.actions/build-linux-openssl3-i686-w64-mingw32-gcc
+++ b/.actions/build-linux-openssl3-i686-w64-mingw32-gcc
@@ -32,8 +32,8 @@ make -j"$(nproc)" -C build
 sudo make -C build install
 cd ..
 
-# Build and install OpenSSL 3.0.14.
-git clone --branch openssl-3.0.14 \
+# Build and install OpenSSL 3.0.15.
+git clone --branch openssl-3.0.15 \
 	--depth=1 https://github.com/openssl/openssl
 cd openssl
 ./Configure mingw --prefix=/fakeroot --openssldir=/fakeroot/openssl \
diff --git a/.actions/fuzz-linux b/.actions/fuzz-linux
index d7119496..313b3a53 100755
--- a/.actions/fuzz-linux
+++ b/.actions/fuzz-linux
@@ -10,7 +10,7 @@ LIBCBOR_TAG="v0.11.0"
 LIBCBOR_ASAN="address alignment bounds"
 LIBCBOR_MSAN="memory"
 OPENSSL_URL="https://github.com/openssl/openssl"
-OPENSSL_TAG="openssl-3.0.14"
+OPENSSL_TAG="openssl-3.0.15"
 ZLIB_URL="https://github.com/madler/zlib"
 ZLIB_TAG="v1.3.1"
 ZLIB_ASAN="address alignment bounds undefined"