diff --git a/src/main.cc b/src/main.cc
index 4d62a63..49af91e 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -200,7 +200,8 @@ unsigned Bot::ShortestPath(int x, int y) {
     if (visited.count(position)) {
       continue;
     }
-    if (!(known_map[position] & static_cast<unsigned>(Direction::LEFT))) {
+    if (!(known_map[position] & static_cast<unsigned>(Direction::LEFT)) &&
+        position.first > 0) {
       auto pos = std::make_pair(position.first - 1, position.second);
       queue.emplace(distance + 1 + AStarHeuristic(pos), pos);
     }
@@ -208,7 +209,8 @@ unsigned Bot::ShortestPath(int x, int y) {
       auto pos = std::make_pair(position.first + 1, position.second);
       queue.emplace(distance + 1 + AStarHeuristic(pos), pos);
     }
-    if (!(known_map[position] & static_cast<unsigned>(Direction::UP))) {
+    if (!(known_map[position] & static_cast<unsigned>(Direction::UP)) &&
+        position.second > 0) {
       auto pos = std::make_pair(position.first, position.second - 1);
       queue.emplace(distance + 1 + AStarHeuristic(pos), pos);
     }