diff --git a/src/lib-cpp/include/Velopack.h b/src/lib-cpp/include/Velopack.h
index 73c4cc4d..8032e303 100644
--- a/src/lib-cpp/include/Velopack.h
+++ b/src/lib-cpp/include/Velopack.h
@@ -50,8 +50,8 @@ extern "C" {
 
 typedef void* vpkc_update_manager_t;
 typedef void (*vpkc_progress_callback_t)(size_t progress);
-typedef void (*vpkc_log_callback_t)(char* pszLevel, char* pszMessage);
-typedef void (*vpkc_hook_callback_t)(char* pszAppVersion);
+typedef void (*vpkc_log_callback_t)(const char* pszLevel, const char* pszMessage);
+typedef void (*vpkc_hook_callback_t)(const char* pszAppVersion);
 
 typedef struct {
     bool AllowVersionDowngrade;
diff --git a/src/lib-cpp/src/bridge.hpp b/src/lib-cpp/src/bridge.hpp
index cd8f4351..b7da5110 100644
--- a/src/lib-cpp/src/bridge.hpp
+++ b/src/lib-cpp/src/bridge.hpp
@@ -9,20 +9,58 @@ struct HookCallbackManager {
     vpkc_hook_callback_t after_update = nullptr;
     vpkc_hook_callback_t first_run = nullptr;
     vpkc_hook_callback_t restarted = nullptr;
-    void install_hook(::rust::String app_version) const {};
-    void update_hook(::rust::String app_version) const {};
-    void obsolete_hook(::rust::String app_version) const {};
-    void uninstall_hook(::rust::String app_version) const {};
-    void firstrun_hook(::rust::String app_version) const {};
-    void restarted_hook(::rust::String app_version) const {};
+    
+    void install_hook(::rust::String app_version) const {
+        if (after_install) {
+            after_install(app_version.c_str());
+        }
+    };
+    
+    void update_hook(::rust::String app_version) const {
+        if (after_update) {
+            after_update(app_version.c_str());
+        }
+    };
+    
+    void obsolete_hook(::rust::String app_version) const {
+        if (before_update) {
+            before_update(app_version.c_str());
+        }
+    };
+    
+    void uninstall_hook(::rust::String app_version) const {
+        if (before_uninstall) {
+            before_uninstall(app_version.c_str());
+        }
+    };
+    
+    void firstrun_hook(::rust::String app_version) const {
+        if (first_run) {
+            first_run(app_version.c_str());
+        }
+    };
+    
+    void restarted_hook(::rust::String app_version) const {
+        if (restarted) {
+            restarted(app_version.c_str());
+        }
+    };
 };
 
 struct DownloadCallbackManager {
     vpkc_progress_callback_t progress_cb = nullptr;
-    void download_progress(int16_t progress) const {};
+    void download_progress(int16_t progress) const {
+        if (progress_cb) {
+            progress_cb(progress);
+        }
+    };
 };
 
 struct LoggerCallbackManager {
     vpkc_log_callback_t lob_cb = nullptr;
-    void log(::rust::String level, ::rust::String message) const {};
+    void log(::rust::String level, ::rust::String message) const {
+        if (lob_cb) {
+            lob_cb(level.c_str(), message.c_str());
+        }
+    };
 };
\ No newline at end of file