diff --git a/php-80/Dockerfile b/php-80/Dockerfile
index c88778cd..be34ebaa 100644
--- a/php-80/Dockerfile
+++ b/php-80/Dockerfile
@@ -341,7 +341,7 @@ RUN cd ${POSTGRES_BUILD_DIR}/src/include && make install
 # https://github.com/kkos/oniguruma/releases
 # Needed by:
 #   - php mbstring
-ENV VERSION_ONIG=6.9.8
+ENV VERSION_ONIG=6.9.9
 ENV ONIG_BUILD_DIR=${BUILD_DIR}/oniguruma
 RUN set -xe; \
     mkdir -p ${ONIG_BUILD_DIR}; \
diff --git a/php-81/Dockerfile b/php-81/Dockerfile
index d333e602..43c89a30 100644
--- a/php-81/Dockerfile
+++ b/php-81/Dockerfile
@@ -342,7 +342,7 @@ RUN cd ${POSTGRES_BUILD_DIR}/src/include && make install
 # https://github.com/kkos/oniguruma/releases
 # Needed by:
 #   - php mbstring
-ENV VERSION_ONIG=6.9.8
+ENV VERSION_ONIG=6.9.9
 ENV ONIG_BUILD_DIR=${BUILD_DIR}/oniguruma
 RUN set -xe; \
     mkdir -p ${ONIG_BUILD_DIR}; \
diff --git a/php-82/Dockerfile b/php-82/Dockerfile
index 964438ba..329be068 100644
--- a/php-82/Dockerfile
+++ b/php-82/Dockerfile
@@ -342,7 +342,7 @@ RUN cd ${POSTGRES_BUILD_DIR}/src/include && make install
 # https://github.com/kkos/oniguruma/releases
 # Needed by:
 #   - php mbstring
-ENV VERSION_ONIG=6.9.8
+ENV VERSION_ONIG=6.9.9
 ENV ONIG_BUILD_DIR=${BUILD_DIR}/oniguruma
 RUN set -xe; \
     mkdir -p ${ONIG_BUILD_DIR}; \
diff --git a/php-83/Dockerfile b/php-83/Dockerfile
index d9176135..81837c63 100644
--- a/php-83/Dockerfile
+++ b/php-83/Dockerfile
@@ -343,7 +343,7 @@ RUN cd ${POSTGRES_BUILD_DIR}/src/include && make install
 # https://github.com/kkos/oniguruma/releases
 # Needed by:
 #   - php mbstring
-ENV VERSION_ONIG=6.9.8
+ENV VERSION_ONIG=6.9.9
 ENV ONIG_BUILD_DIR=${BUILD_DIR}/oniguruma
 RUN set -xe; \
     mkdir -p ${ONIG_BUILD_DIR}; \