diff --git i/src/cursesframe.cpp w/src/cursesframe.cpp
index 70c9102..95fc31d 100644
--- i/src/cursesframe.cpp
+++ w/src/cursesframe.cpp
@@ -93,10 +93,10 @@ void CursesFrame::refresh()
 
         int headercol = focused ? C_INV : C_DEF;
         wattron(w_border, A_BOLD | headercol);
-        mvwprintw(w_border, 0, 1, header.c_str());
+        mvwprintw(w_border, 0, 1, "%s", header.c_str());
         wattroff(w_border, A_BOLD | headercol);
 
-        mvwprintw(w_border, w_border->_maxy, 1, footer.c_str());
+        mvwprintw(w_border, w_border->_maxy, 1, "%s", footer.c_str());
 
         wnoutrefresh(w_border);
     }
@@ -108,7 +108,7 @@ void CursesFrame::printw(string str, int attr)
     if (attr != 0) {
         wattron(w_main, attr);
     }
-    wprintw(w_main, fitstrtowin(str).c_str());
+    wprintw(w_main, "%s", fitstrtowin(str).c_str());
     if (attr != 0) {
         wattroff(w_main, attr);
     }
@@ -119,7 +119,7 @@ void CursesFrame::mvprintw(int x, int y, string str, int attr)
     if (attr != 0) {
         wattron(w_main, attr);
     }
-    mvwprintw(w_main, y, x, fitstrtowin(str, x).c_str());
+    mvwprintw(w_main, y, x, "%s", fitstrtowin(str, x).c_str());
     if (attr != 0) {
         wattroff(w_main, attr);
     }