diff --git a/data/org.calculate.Core.service b/data/org.calculate.Core.service
index 761a01d..a8f28e9 100644
--- a/data/org.calculate.Core.service
+++ b/data/org.calculate.Core.service
@@ -1,4 +1,4 @@
 [D-BUS Service]
 Name=org.calculate.Core
-Exec=/usr/bin/python3 /usr/libexec/calculate/cl-dbus-core.py
+Exec=/usr/bin/python3.7 /usr/libexec/calculate/cl-dbus-core.py
 User=root