diff --git a/app/terraform/proxy/fastly.py b/app/terraform/proxy/fastly.py
index f00e506..0261416 100644
--- a/app/terraform/proxy/fastly.py
+++ b/app/terraform/proxy/fastly.py
@@ -11,7 +11,6 @@ class ProxyFastlyAutomation(ProxyAutomation):
     short_name = "proxy_fastly"
     description = "Deploy proxies to Fastly"
     provider = "fastly"
-    subgroup_max = min(current_app.config.get("FASTLY_MAX_BACKENDS", 5), 20)
 
     template_parameters = [
         "aws_access_key",
@@ -114,6 +113,11 @@ class ProxyFastlyAutomation(ProxyAutomation):
     {% endfor %}{# group #}
     """
 
+    def __init__(self):
+        # Requires Flask application context to read configuration
+        self.subgroup_max = min(current_app.config.get("FASTLY_MAX_BACKENDS", 5), 20)
+        super().__init__()
+
     def import_state(self, state: Optional[Any]) -> None:
         proxies = Proxy.query.filter(
             Proxy.provider == self.provider,