diff --git a/Dockerfile.ubuntu-1804 b/Dockerfile.ubuntu-1804
index 1006ebd..f1f6cf9 100644
--- a/Dockerfile.ubuntu-1804
+++ b/Dockerfile.ubuntu-1804
@@ -16,6 +16,7 @@ ENV LGSM_LOGDIR=/data/log
 ENV LGSM_SERVERFILES=/data/serverfiles
 ENV LGSM_DATADIR=/data/data
 ENV LGSM_CONFIG=/data/config-lgsm
+ENV LGSM_DEV=false
 ENV GAMESERVER=jc2server
 ENV UPDATE_CHECK=60
 ENV USER=linuxgsm
diff --git a/Dockerfile.ubuntu-2004 b/Dockerfile.ubuntu-2004
index 8719167..43565fb 100644
--- a/Dockerfile.ubuntu-2004
+++ b/Dockerfile.ubuntu-2004
@@ -16,6 +16,7 @@ ENV LGSM_LOGDIR=/data/log
 ENV LGSM_SERVERFILES=/data/serverfiles
 ENV LGSM_DATADIR=/data/data
 ENV LGSM_CONFIG=/data/config-lgsm
+ENV LGSM_DEV=false
 ENV GAMESERVER=jc2server
 ENV UPDATE_CHECK=60
 ENV USER=linuxgsm
diff --git a/Dockerfile.ubuntu-2204 b/Dockerfile.ubuntu-2204
index 60029a5..c8c824c 100644
--- a/Dockerfile.ubuntu-2204
+++ b/Dockerfile.ubuntu-2204
@@ -16,6 +16,7 @@ ENV LGSM_LOGDIR=/data/log
 ENV LGSM_SERVERFILES=/data/serverfiles
 ENV LGSM_DATADIR=/data/data
 ENV LGSM_CONFIG=/data/config-lgsm
+ENV LGSM_DEV=false
 ENV GAMESERVER=jc2server
 ENV UPDATE_CHECK=60
 ENV USER=linuxgsm
diff --git a/entrypoint-user.sh b/entrypoint-user.sh
index 7455704..4238d64 100755
--- a/entrypoint-user.sh
+++ b/entrypoint-user.sh
@@ -30,6 +30,12 @@ elif [ -d "/app/lgsm/modules" ]; then
   chmod +x /app/lgsm/modules/*
 fi
 
+# Enable developer mode
+if [ "${LGSM_DEV}" == "true" ]; then
+  echo -e "developer mode enabled"
+  ./"${GAMESERVER}" developer
+fi
+
 # Install game server
 if [ -z "$(ls -A -- "/data/serverfiles" 2> /dev/null)" ]; then
   echo -e ""