diff --git a/reqs_optional/reqs_constraints.txt b/reqs_optional/reqs_constraints.txt
index 8bde64f7d..53b9efbcb 100644
--- a/reqs_optional/reqs_constraints.txt
+++ b/reqs_optional/reqs_constraints.txt
@@ -1,5 +1,7 @@
 # ensure doesn't drift, e.g. Issue #1348
 torch==2.2.1
-gradio==4.26.0
-gradio_client==0.15.1
+gradio==3.50.2
+gradio_client==0.6.1
+# gradio==4.26.0
+# gradio_client==0.15.1
 transformers==4.41.0
diff --git a/reqs_optional/requirements_optional_langchain.txt b/reqs_optional/requirements_optional_langchain.txt
index 3ef1d96be..6316fd918 100644
--- a/reqs_optional/requirements_optional_langchain.txt
+++ b/reqs_optional/requirements_optional_langchain.txt
@@ -92,7 +92,7 @@ weaviate-client==3.26.2
 # vllm==0.2.2
 
 # only gradio>=4
-gradio_pdf>=0.0.7
+#gradio_pdf>=0.0.7
 
 gradio_tools>=0.0.9
 
diff --git a/requirements.txt b/requirements.txt
index fa5e61788..f1fa8c3ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,12 +1,19 @@
 # no websockets, more cloud friendly
 # able to make gradio clean-up states
+gradio==3.50.2
+gradio_client==0.6.1
 
 # gradio @ https://h2o-release.s3.amazonaws.com/h2ogpt/gradio-4.25.0-py3-none-any.whl
 # gradio_client @ https://h2o-release.s3.amazonaws.com/h2ogpt/gradio_client-0.15.0-py3-none-any.whl
+
+# gradio @ https://h2o-release.s3.amazonaws.com/h2ogpt/gradio-4.20.1-py3-none-any.whl
+# gradio_client==0.11.0
+
 #gradio @ https://h2o-release.s3.amazonaws.com/h2ogpt/gradio-4.20.1-py3-none-any.whl
 #gradio_client==0.11.0
-gradio @ https://h2o-release.s3.amazonaws.com/h2ogpt/gradio-4.26.0-py3-none-any.whl
-gradio_client @ https://h2o-release.s3.amazonaws.com/h2ogpt/gradio_client-0.15.1-py3-none-any.whl
+#gradio @ https://h2o-release.s3.amazonaws.com/h2ogpt/gradio-4.26.0-py3-none-any.whl
+#gradio_client @ https://h2o-release.s3.amazonaws.com/h2ogpt/gradio_client-0.15.1-py3-none-any.whl
+
 
 uvicorn[standard]
 gunicorn
diff --git a/src/version.py b/src/version.py
index 95ab58bde..d3cc2c952 100644
--- a/src/version.py
+++ b/src/version.py
@@ -1 +1 @@
-__version__ = "cee999f35369a56c811ac250064a47c9b568f532"
+__version__ = "5fe7db602bae18c110c937f014f3d237aa1eea05"