diff --git a/argpopt.h b/argpopt.h
index 9be6d2c..4ab2569 100644
--- a/argpopt.h
+++ b/argpopt.h
@@ -25,7 +25,7 @@ struct Config
     bool ignoreClientMachine = false;
 };
 
-const char *argp_program_version = "1.0.3";
+const char *argp_program_version = "1.0.4";
 const char *argp_program_bug_address = "<carl@uvos.xyz>";
 static char doc[] = "Deamon that stops programms via SIGSTOP when their X11 windows lose focus.";
 static char args_doc[] = "";
diff --git a/debian/changelog b/debian/changelog
index 80f8af4..c9fa8bc 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,7 @@
+sigstoped (1.0.4) unstable; urgency=medium
+  Fix memory leak in XInstance::getTopLevelWindows()
+ -- Uvos <carl@uvos.xyz>  Mon, 16 Jun 2020 09:47:00 +0100
+
 sigstoped (1.0.3) unstable; urgency=medium
   Ignore BadWindow errors caused by faulty __NET_ACTIVE_WINDOW events
  -- Uvos <carl@uvos.xyz>  Mon, 15 Jun 2020 23:47:00 +0100
diff --git a/xinstance.cpp b/xinstance.cpp
index 836eb64..c785a97 100644
--- a/xinstance.cpp
+++ b/xinstance.cpp
@@ -107,13 +107,13 @@ std::vector<Window> XInstance::getTopLevelWindows()
     Window* windows = nullptr;
     unsigned int nwindows;
     XQueryTree(display, RootWindow(display, screen), &root_return, &parent_return, &windows, &nwindows);
-    
     std::vector<Window> out;
     out.reserve(nwindows);
-    for(unsigned int i; i < nwindows; ++i)
+    for(unsigned int i = 0; i < nwindows; ++i)
     {
         out.push_back(windows[i]);
     }
+    if(windows != nullptr) XFree(windows);
     return out;
 }