diff --git a/docs/user/period-calculation.md b/docs/user/period-calculation.md
index 8268480..79e9780 100644
--- a/docs/user/period-calculation.md
+++ b/docs/user/period-calculation.md
@@ -1,4 +1,4 @@
-# Period Calculation# Period Calculation# Period Calculation
+# Period Calculation