diff --git a/app.py b/app.py
index 15293ad..c6d586f 100644
--- a/app.py
+++ b/app.py
@@ -222,8 +222,8 @@ def run_instance():
         flash("The challenge name is not valid.", "red")
         return redirect(url_for('index'))
 
-    if get_challenge_count_per_team(session["team_id"]) >= MAX_CHALLENGES_PER_TEAM:
-        flash(f"Your team has reached the maximum number of concurrent running instances ({MAX_CHALLENGES_PER_TEAM}).", "red")
+    if get_challenge_count_per_team(session["team_id"]) >= MAX_INSTANCE_PER_TEAM:
+        flash(f"Your team has reached the maximum number of concurrent running instances ({MAX_INSTANCE_PER_TEAM}).", "red")
         return redirect(url_for('index'))
 
     remove_user_running_instance(session["user_id"])
diff --git a/app/app.py b/app/app.py
index 9003780..770274f 100644
--- a/app/app.py
+++ b/app/app.py
@@ -16,7 +16,7 @@ def create_app():
     app.config["SQLALCHEMY_DATABASE_URI"] = getenv("DATABASE_URI")
     app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
 
-    app.config["ENABLE_RECAPTCHA"] = getenv("ENABLE_RECAPTCHA", False)
+    app.config["ENABLE_RECAPTCHA"] = getenv("ENABLE_RECAPTCHA", False) in ["1", "True", "TRUE"]
     app.config["RECAPTCHA_SITE_KEY"] = getenv("RECAPTCHA_SITE_KEY", "")
     app.config["RECAPTCHA_SECRET_KEY"] = getenv("RECAPTCHA_SECRET_KEY", "")