diff --git a/setup.py b/setup.py
index 2c2d826..633dd97 100644
--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
         "tqdm~=4.39.0",
         "flask~=1.0.2",
         "psutil~=5.6.3",
-        "jsonpickle~=1.0",
+        "jsonpickle>=1,<3",
         "GPy[plotting]~=1.9.9",
         "filelock~=3.0.10",
         "ipdb~=0.11",