diff --git a/requirements.txt b/requirements.txt
index 61f40c3..1b879a9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,6 +11,7 @@ dwave-samplers==1.0.0
 dwave-system==1.17.0
 dwave-tabu==0.5.0
 dwavebinarycsp==0.2.0
+docplex==2.23.222
 numpy==1.21.4  
 odfpy==1.4.1
 pathlib==1.0.1