diff --git a/src/timequiz.h b/src/timequiz.h
index 9803ee9..ca65f16 100644
--- a/src/timequiz.h
+++ b/src/timequiz.h
@@ -3,8 +3,8 @@
 
 void timequiz();
 int getRandomQuestionIndex(int askedQuestions[], int totalQuestions);
-void displayQuestion(char* question, char* answers[], int correctIndex);
-void processUserAnswer(int userAnswer, int correctIndex, int* score, int* totalCorrectAnswers, char* answers[]);
+void displayQuestion(const char* question,const char* answers[], int correctIndex);
+void processUserAnswer(int userAnswer, int correctIndex, int* score, int* totalCorrectAnswers,const char* answers[]);
 int isValidAnswer(int userAnswer);
 
 #endif //ende TIMEQUIZ_H