diff --git a/Dockerfile b/Dockerfile
index abed586d..8437d38e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1
-FROM continuumio/miniconda3:latest
+FROM continuumio/miniconda3:4.12.0
 
 # Install system dependencies.
 RUN apt-get update -y && \
diff --git a/README.org b/README.org
index 19ee69de..e03bc37d 100644
--- a/README.org
+++ b/README.org
@@ -37,6 +37,10 @@
      - [[https://github.com/debanjum/semantic-search/tree/master/src/interface/emacs#installation][Install]] [[./src/interface/emacs/semantic-search.el][semantic-search.el]]
      - Run ~M-x semantic-search <user-query>~
 
+** Run Unit tests
+
+  `pytest`
+
 ** Upgrade
    #+begin_src shell
      docker-compose build --pull
diff --git a/config/environment.yml b/config/environment.yml
index bb1dc845..289d20d7 100644
--- a/config/environment.yml
+++ b/config/environment.yml
@@ -2,19 +2,19 @@ name: semantic-search
 channels:
   - conda-forge
 dependencies:
-  - python=3.*
-  - numpy=1.*
-  - pytorch=1.*
-  - transformers=4.*
+  - python=3.8.*
+  - numpy=1.22.4
+  - pytorch=1.11.0
+  - transformers=4.19.4
   - sentence-transformers=2.1.0
-  - fastapi=0.*
-  - uvicorn=0.*
-  - pyyaml=5.*
-  - pytest=6.*
-  - pillow=8.*
-  - torchvision=0.*
-  - openai=0.*
-  - pydantic=1.*
-  - jinja2=3.0.*
-  - aiofiles=0.*
-  - huggingface_hub=0.*
\ No newline at end of file
+  - fastapi=0.77.1
+  - uvicorn=0.17.6
+  - pyyaml=6.0
+  - pytest=7.1.2
+  - pillow=8.4.0
+  - torchvision=0.12.0
+  - openai=0.20.0
+  - pydantic=1.9.1
+  - jinja2=3.1.2
+  - aiofiles=0.8.0
+  - huggingface_hub=0.8.1