diff --git a/setup.py b/setup.py
index a6546599..7de8a908 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@ else:
     requirements.append("enum34==1.1.6")  # v1.1.6 is needed by halo 0.0.30 / spinners 0.0.24
     requirements.append("halo==0.0.30")  # halo==0.0.30 is the last version to support py2.7
     requirements.append("vivisect==0.1.0")
-    requirements.append("viv-utils")
+    requirements.append("viv-utils==0.3.18")
     requirements.append("networkx==2.2")  # v2.2 is last version supported by Python 2.7
     requirements.append("backports.functools-lru-cache")