diff --git a/specs/core/0_beacon-chain.md b/specs/core/0_beacon-chain.md
index 56789d822..9399bc255 100644
--- a/specs/core/0_beacon-chain.md
+++ b/specs/core/0_beacon-chain.md
@@ -1384,7 +1384,7 @@ def process_deposit(state: BeaconState,
 
 ### Routines for updating validator status
 
-Note: All functions in this section mutate `state`. 
+Note: All functions in this section mutate `state`.
 
 ```python
 def activate_validator(state: BeaconState, index: int, genesis: bool) -> None: