diff --git a/conanfile.txt b/conanfile.txt
index 85c1238b40b290ca181660b0a8bda665b1c88c5b..82e255fb2770b73d77ce243b6aea14e50b61c300 100644
--- a/conanfile.txt
+++ b/conanfile.txt
@@ -4,6 +4,7 @@ catch2/2.13.3
 eigen/3.3.8
 boost/1.74.0
 zlib/1.2.11
+doxygen/1.8.20
 
 [generators]
 cmake