diff --git a/docker-compose.yml b/docker-compose.yml
index 130ee20..c124ac7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -7,6 +7,7 @@ services:
     depends_on:
         - redis
     environment:
+      DEV_MODE: ${DEV_MODE:-}
       DOMAIN: ${DOMAIN}
       SHARED_SECRET: ${SHARED_SECRET}
       WELCOME_MESSAGE: ${WELCOME_MESSAGE:-}
@@ -147,6 +148,7 @@ services:
       DISABLE_VIDEO_PREVIEW: ${DISABLE_VIDEO_PREVIEW:-false}
       CHAT_ENABLED: ${CHAT_ENABLED:-true}
       CHAT_START_CLOSED: ${CHAT_START_CLOSED:-false}
+      DEV_MODE: ${DEV_MODE:-}
     networks:
       bbb-net:
         ipv4_address: 10.7.7.11
diff --git a/mod/core/web/bigbluebutton.properties b/mod/core/web/bigbluebutton.properties
index 5791073..2af6d9f 100644
--- a/mod/core/web/bigbluebutton.properties
+++ b/mod/core/web/bigbluebutton.properties
@@ -297,7 +297,11 @@ beans.presentationService.testPresentationName=appkonference
 # Uploaded presentation file
 beans.presentationService.testUploadedPresentation=appkonference.txt
 # Default Uploaded presentation file
+{{ if isTrue .Env.DEV_MODE }}
+beans.presentationService.defaultUploadedPresentation=https://test.bigbluebutton.org/default.pdf
+{{else}}
 beans.presentationService.defaultUploadedPresentation=${bigbluebutton.web.serverURL}/default.pdf
+{{end}}
 
 presentationBaseURL=${bigbluebutton.web.serverURL}/bigbluebutton/presentation
 
diff --git a/mod/html5/entrypoint.sh b/mod/html5/entrypoint.sh
index 08be159..4bbb8d7 100755
--- a/mod/html5/entrypoint.sh
+++ b/mod/html5/entrypoint.sh
@@ -8,6 +8,11 @@ export ENVIRONMENT_TYPE=production
 export PORT=3000
 export LANG=en_US.UTF-8
 
+if [ "$DEV_MODE" == true ]; then
+    echo "DEV_MODE=true, disable TLS certificate rejecting"
+    export NODE_TLS_REJECT_UNAUTHORIZED=0
+fi
+
 rm -f /app/programs/server/assets/app/config/settings.yml
 dockerize \
     -template /app/programs/server/assets/app/config/settings.yml.tmpl:/app/programs/server/assets/app/config/settings.yml \