diff --git a/Dockerfile.deb b/Dockerfile.deb
index 873266a7..62194947 100644
--- a/Dockerfile.deb
+++ b/Dockerfile.deb
@@ -1,9 +1,9 @@
 FROM debian:bullseye-slim
 
-ARG KONG_VERSION=2.8.4
+ARG KONG_VERSION=2.8.5
 ENV KONG_VERSION $KONG_VERSION
 
-ARG KONG_SHA256="28f7f215a097612f35d3ae86d35c3fbb24a1454a7529f500e2341d5764a5d8a5"
+ARG KONG_SHA256="9ae11fb9e748caaf564e825b4cbfd58a25a6ccbf0d6a470174c2138680a8f7a3"
 
 ARG KONG_PREFIX=/usr/local/kong
 ENV KONG_PREFIX $KONG_PREFIX
diff --git a/Dockerfile.rpm b/Dockerfile.rpm
index 84a13e0b..bd8b0f3e 100644
--- a/Dockerfile.rpm
+++ b/Dockerfile.rpm
@@ -1,9 +1,9 @@
 FROM redhat/ubi8
 
-ARG KONG_VERSION=2.8.4
+ARG KONG_VERSION=2.8.5
 ENV KONG_VERSION $KONG_VERSION
 
-ARG KONG_SHA256="5d3e2712dd4d6b2b3adbe9bafdadd1f15f1f9c89256f9c24d339e4f44f9cc94d"
+ARG KONG_SHA256="2e82cc14aef707796c952d38c835c9e0abc0e3ccdc94f1d752118699a62672fb"
 
 ARG KONG_PREFIX=/usr/local/kong
 ENV KONG_PREFIX $KONG_PREFIX
diff --git a/ubuntu/Dockerfile b/ubuntu/Dockerfile
index 6d3d2def..d6b22ac6 100644
--- a/ubuntu/Dockerfile
+++ b/ubuntu/Dockerfile
@@ -7,10 +7,10 @@ ARG EE_PORTS
 
 COPY kong.deb /tmp/kong.deb
 
-ARG KONG_VERSION=2.8.4
+ARG KONG_VERSION=2.8.5
 ENV KONG_VERSION $KONG_VERSION
 
-ARG KONG_AMD64_SHA="e4bc62c80f717114cc486776ee453931c5de0e8eaf0901ac11dbb4b2bae14534"
+ARG KONG_AMD64_SHA="efba2bb8b1cb567bc90cc371e80503c558cbc74377b34609552ae2273def3fe3"
 ARG KONG_ARM64_SHA="4fff44f9a0c7b06469591b7d1499a99a100109bc3f08dc412dd0eb38ff383d35"
 
 # hadolint ignore=DL3015
diff --git a/update.sh b/update.sh
index fcd3ca28..6ff7489f 100755
--- a/update.sh
+++ b/update.sh
@@ -34,11 +34,11 @@ function get_url() {
 
   eval $args
 
-  raw_url=$(egrep -o 'https?://packages.konghq.com/public/gateway-[^ ]+' $dockerfile | sed 's/\"//g')
+  raw_url=$(grep -E -o 'https?://packages.konghq.com/public/gateway-[^ ]+' $dockerfile | sed 's/\"//g')
 
   # set variables contained in raw url
   KONG_VERSION=$version
-  KONG_REPO=$(echo ${KONG_VERSION%.*} | sed 's/\.//')
+  major_minor=$(echo ${KONG_VERSION%.*} | sed 's/\.//')
   ARCH=$arch
 
   eval echo $raw_url
@@ -52,8 +52,8 @@ if [[ -n "$kbt_in_kong_v" ]]; then
   sed -i.bak 's/KONG_BUILD_TOOLS?=.*/KONG_BUILD_TOOLS?='$kbt_in_kong_v'/g' Makefile
 fi
 
-# Dockerfile.deb
-url=$(get_url Dockerfile.rpm amd64 "VERSION=8")
+# Dockerfile.rpm
+url=$(get_url Dockerfile.rpm x86_64 "VERSION=8")
 echo $url
 curl -fL $url -o /tmp/kong
 new_sha=$(sha256sum /tmp/kong | cut -b1-64)
@@ -62,7 +62,7 @@ sed -i.bak 's/ARG KONG_SHA256=.*/ARG KONG_SHA256=\"'$new_sha'\"/g' Dockerfile.rp
 sed -i.bak 's/ARG KONG_VERSION=.*/ARG KONG_VERSION='$version'/g' Dockerfile.rpm
 
 pushd ubuntu
-   url=$(get_url Dockerfile amd64 "UBUNTU_CODENAME=jammy")
+   url=$(get_url Dockerfile amd64 "CODENAME=jammy")
    echo $url
    curl -fL $url -o /tmp/kong
    new_sha=$(sha256sum /tmp/kong | cut -b1-64)