diff --git a/api/__init__.py b/api/__init__.py
index 41455dd..50dd7f3 100644
--- a/api/__init__.py
+++ b/api/__init__.py
@@ -150,7 +150,7 @@ from .s33_dma import get_all_district_metering_area_ids, get_all_district_meteri
 
 from .s33_dma_gen import generate_district_metering_area, generate_sub_district_metering_area
 
-from .s34_sa import calculate_service_area
+from .s34_sa_cal import calculate_service_area
 
 from .s35_vd import calculate_virtual_district
 
diff --git a/api/s34_sa.py b/api/s34_sa_cal.py
similarity index 100%
rename from api/s34_sa.py
rename to api/s34_sa_cal.py