diff --git a/demo/demo/demo.cpp b/demo/demo/demo.cpp
index ccc5c7f..75012b6 100644
--- a/demo/demo/demo.cpp
+++ b/demo/demo/demo.cpp
@@ -22,10 +22,10 @@ int main(int argc, char *argv[]) {
     signal(SIGINT, sig_handler);
 
 
-    char *net = "yolo3_berkeley.rt";
+    std::string net = "yolo3_berkeley.rt";
     if(argc > 1)
         net = argv[1]; 
-    char *input = "../demo/yolo_test.mp4";
+    std::string input = "../demo/yolo_test.mp4";
     if(argc > 2)
         input = argv[2]; 
     char ntype = 'y';
diff --git a/include/tkDNN/Network.h b/include/tkDNN/Network.h
index 07924d0..eb17ea8 100644
--- a/include/tkDNN/Network.h
+++ b/include/tkDNN/Network.h
@@ -48,7 +48,7 @@ public:
 
     bool addLayer(Layer *l);
     void print();
-    const char *getNetworkRTName(char *network_name);
+    const char *getNetworkRTName(const char *network_name);
 
     cudnnDataType_t dataType;
     cudnnTensorFormat_t tensorFormat;
diff --git a/src/CenternetDetection.cpp b/src/CenternetDetection.cpp
index 997989e..97668e6 100644
--- a/src/CenternetDetection.cpp
+++ b/src/CenternetDetection.cpp
@@ -133,7 +133,7 @@ void CenternetDetection::preprocess(cv::Mat &frame){
     float new_height = sz.height * scale;
     float new_width = sz.width * scale;
     if(sz.height != sz_old.height && sz.width != sz_old.width){
-        float c[] = {new_width / 2.0, new_height /2.0};
+        float c[] = {new_width / 2.0f, new_height /2.0f};
         float s[2];
 
         if(sz.width > sz.height){
diff --git a/src/Network.cpp b/src/Network.cpp
index cbbdc91..885ec1a 100644
--- a/src/Network.cpp
+++ b/src/Network.cpp
@@ -120,7 +120,7 @@ void Network::print() {
     printCenteredTitle("", '=', 60);
     std::cout<<"\n";
 }
-const char *Network::getNetworkRTName(char *network_name){
+const char *Network::getNetworkRTName(const char *network_name){
     networkName = network_name;
     int network_name_len = strlen(network_name);
     char *RTName = (char *)malloc((network_name_len + 9)*sizeof(char));