diff --git a/Dockerfile b/Dockerfile
index b3c07eae..cdbf0cdb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -39,7 +39,7 @@ RUN \
   echo "**** install calibre-web ****" && \
   if [ -z ${CALIBREWEB_RELEASE+x} ]; then \
     CALIBREWEB_RELEASE=$(curl -sX GET "https://api.github.com/repos/janeczku/calibre-web/releases/latest" \
-    | awk '/tag_name/{print $4;exit}' FS='[""]'); \
+    | jq -r '.tag_name'); \
   fi && \
   curl -o \
     /tmp/calibre-web.tar.gz -L \
@@ -60,7 +60,7 @@ RUN \
   echo "***install kepubify" && \
   if [ -z ${KEPUBIFY_RELEASE+x} ]; then \
     KEPUBIFY_RELEASE=$(curl -sX GET "https://api.github.com/repos/pgaskin/kepubify/releases/latest" \
-    | awk '/tag_name/{print $4;exit}' FS='[""]'); \
+    | jq -r '.tag_name'); \
   fi && \
   curl -o \
     /usr/bin/kepubify -L \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index b33e0dd2..7de397cc 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -45,7 +45,7 @@ RUN \
   echo "**** install calibre-web ****" && \
   if [ -z ${CALIBREWEB_RELEASE+x} ]; then \
     CALIBREWEB_RELEASE=$(curl -sX GET "https://api.github.com/repos/janeczku/calibre-web/releases/latest" \
-      | awk '/tag_name/{print $4;exit}' FS='[""]'); \
+      | jq -r '.tag_name'); \
   fi && \
   curl -o \
     /tmp/calibre-web.tar.gz -L \
@@ -66,7 +66,7 @@ RUN \
   echo "***install kepubify" && \
   if [ -z ${KEPUBIFY_RELEASE+x} ]; then \
     KEPUBIFY_RELEASE=$(curl -sX GET "https://api.github.com/repos/pgaskin/kepubify/releases/latest" \
-      | awk '/tag_name/{print $4;exit}' FS='[""]'); \
+      | jq -r '.tag_name'); \
   fi && \
   curl -o \
     /usr/bin/kepubify -L \