diff --git a/src/opticalcontroller/dijsktra.py b/src/opticalcontroller/dijsktra.py
index 7ddfa325ab8db6beec043d0c7e9766acb8ad1c3e..a86d1d93dcbc30b9e4e3b95a34a0922439871bf6 100644
--- a/src/opticalcontroller/dijsktra.py
+++ b/src/opticalcontroller/dijsktra.py
@@ -12,6 +12,10 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# TODO: migrate to NetworkX:
+# https://networkx.org/documentation/stable/index.html
+# https://networkx.org/documentation/stable/reference/algorithms/shortest_paths.html
+
 import sys
 
 class Vertex: