diff --git a/Dockerfile b/Dockerfile
index 9d012d9..3d81c59 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,7 +15,7 @@
 FROM python:3.9-slim-buster
 
 ARG VERSION="0.1.23"
-ARG SIMULATOR_VERSION="2.2.1"
+ARG SIMULATOR_VERSION="2.2.0"
 
 # metadata
 LABEL \
diff --git a/biosimulators.json b/biosimulators.json
index 49f553e..3b359f6 100644
--- a/biosimulators.json
+++ b/biosimulators.json
@@ -1,7 +1,7 @@
 {
   "id": "tellurium",
   "name": "tellurium",
-  "version": "2.2.1",
+  "version": "2.2.0",
   "description": "tellurium is a Python-based environment for model building, simulation, and analysis that facilitates reproducibility of models in systems and synthetic biology.",
   "urls": [{
       "type": "Home page",