diff --git a/src/bonus/checker b/src/bonus/checker
index 9719d152e5c193e2d2ffad5f37008008dd632381..3b4e3f69c6775085ebed6dfb910fa056f9a5283c 100755
--- a/src/bonus/checker
+++ b/src/bonus/checker
@@ -1,5 +1,6 @@
 #!/bin/bash
 
+LC_ALL=C
 TASKS=0
 mkdir -p out
 
diff --git a/src/task-1/checker b/src/task-1/checker
index 65be8f4e871aa51c4473bc5bffcce6ab973150e2..fc4fafc0b254e6ae244a02c2ece38913edd7958a 100755
--- a/src/task-1/checker
+++ b/src/task-1/checker
@@ -1,5 +1,6 @@
 #!/bin/bash
 
+LC_ALL=C
 TOTAL_POINTS=0
 mkdir -p out