diff --git a/bolt-sidecar/.env.example b/bolt-sidecar/.env.example
index cf7785bb4..faeb05ad1 100644
--- a/bolt-sidecar/.env.example
+++ b/bolt-sidecar/.env.example
@@ -52,6 +52,9 @@ BOLT_SIDECAR_SLOT_TIME=12
 # The deadline in the slot at which the sidecar will stop accepting new
 # commitments for the next block (parsed as milliseconds)
 BOLT_SIDECAR_COMMITMENT_DEADLINE=8000
+# Toggle to enable unsafe lookahead for the sidecar. If `true`, commitments requests will be
+# validated against a two-epoch lookahead window.
+BOLT_SIDECAR_ENABLE_UNSAFE_LOOKAHEAD=false
 
 # Signing options.
 BOLT_SIDECAR_CONSTRAINT_PRIVATE_KEY=