diff --git a/Dockerfile b/Dockerfile
index 5fccae04..13a0257e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -40,8 +40,8 @@ ARG GECKODRIVER_VERSION="0.34.0-r0"
 # renovate: datasource=repology depName=alpine_3_19/openssl versioning=loose
 ARG OPENSSL_VERSION="3.1.4-r5"
 
-RUN apk add --no-cache firefox && \
-    apk add --no-cache --repository=https://dl-cdn.alpinelinux.org/alpine/edge/community geckodriver && \
+RUN apk add --no-cache firefox=="${FIREFOX_VERSION}" && \
+    apk add --no-cache --repository=https://dl-cdn.alpinelinux.org/alpine/edge/community geckodriver=="${GECKODRIVER_VERSION}" && \
     ln -s /usr/bin/geckodriver /usr/local/bin/geckodriver && \
     rm -rf /var/cache/apk/* /tmp/*
 
diff --git a/Dockerfile.debian b/Dockerfile.debian
index 688feb1a..4dc46e62 100644
--- a/Dockerfile.debian
+++ b/Dockerfile.debian
@@ -101,7 +101,7 @@ ARG FIREFOX_VERSION="115.7.0esr-1~deb12u1"
 
 # Install required packages
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends firefox-esr && \
+    apt-get install -y --no-install-recommends firefox-esr=="${FIREFOX_VERSION}" && \
     apt-get autoremove -y && \
     apt-get clean && \
     rm -rf /tmp/* /var/lib/apt/lists/* /var/tmp/* /usr/share/doc /usr/share/man