diff --git a/Profile/Profile.cpp b/Profile/Profile.cpp
index 86daecc..4a7f183 100644
--- a/Profile/Profile.cpp
+++ b/Profile/Profile.cpp
@@ -141,7 +141,7 @@ auto Profile::getCredits() -> std::int32_t {
     return _credits;
 }
 
-auto Profile::storyProgress() -> std::int32_t {
+auto Profile::storyProgress() const -> std::int32_t {
     return _storyProgress;
 }
 
@@ -161,7 +161,7 @@ auto Profile::getStoryProgress() -> std::int32_t {
     return _storyProgress;
 }
 
-auto Profile::lastMissionId() -> std::int32_t {
+auto Profile::lastMissionId() const -> std::int32_t {
     return _lastMissionId;
 }
 
diff --git a/Profile/Profile.h b/Profile/Profile.h
index 33611c6..9da11f5 100644
--- a/Profile/Profile.h
+++ b/Profile/Profile.h
@@ -32,10 +32,10 @@ class Profile {
         auto credits() const -> std::int32_t;
         auto getCredits() -> std::int32_t;
 
-        auto storyProgress() -> std::int32_t;
+        auto storyProgress() const -> std::int32_t;
         auto getStoryProgress() -> std::int32_t;
 
-        auto lastMissionId() -> std::int32_t;
+        auto lastMissionId() const -> std::int32_t;
         auto getLastMissionId() -> std::int32_t;
 
         auto backup(const std::string& filename) -> bool;