diff --git a/CHANGELOG.md b/CHANGELOG.md
index 00a713ce..382adc16 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,12 +12,17 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 #### Changed
 
+- Force jinja2==3.0.3 [#551](https://github.com/askap-vast/vast-tools/pull/551)
+
 #### Fixed
 
+- Downgraded jinja2 to fix bug in docs deployment [#551](https://github.com/askap-vast/vast-tools/pull/551)
+
 #### Removed
 
 #### List of PRs
 
+- [#551](https://github.com/askap-vast/vast-tools/pull/551): fix: Downgrade jinja2 to fix bug in docs deployment
 - [#552](https://github.com/askap-vast/vast-tools/pull/552): feat: Add 2023 workshop notebook to docs
 
 ## [3.1.0](https://github.com/askap-vast/vast-tools/releases/v3.1.0) (2024-07-26)
diff --git a/poetry.lock b/poetry.lock
index 7906122e..450fa5b4 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.5.1 and should not be changed by hand.
 
 [[package]]
 name = "aiofiles"
@@ -1391,13 +1391,13 @@ trio = ["async_generator", "trio"]
 
 [[package]]
 name = "jinja2"
-version = "3.1.4"
+version = "3.0.3"
 description = "A very fast and expressive template engine."
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.6"
 files = [
-    {file = "jinja2-3.1.4-py3-none-any.whl", hash = "sha256:bc5dd2abb727a5319567b7a813e6a2e7318c39f4f487cfe6c89c6f9c7d25197d"},
-    {file = "jinja2-3.1.4.tar.gz", hash = "sha256:4a3aee7acbbe7303aede8e9648d13b8bf88a429282aa6122a993f0ac800cb369"},
+    {file = "Jinja2-3.0.3-py3-none-any.whl", hash = "sha256:077ce6014f7b40d03b47d1f1ca4b0fc8328a692bd284016f806ed0eaca390ad8"},
+    {file = "Jinja2-3.0.3.tar.gz", hash = "sha256:611bb273cd68f3b993fabdc4064fc858c5b47a973cb5aa7999ec1ba405c87cd7"},
 ]
 
 [package.dependencies]
@@ -4324,4 +4324,4 @@ test = ["big-O", "jaraco.functools", "jaraco.itertools", "jaraco.test", "more-it
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8.0"
-content-hash = "34a7a3b2f0af9a367987819c87b67fbd34df59a507c3652fe85df402c3dab2ca"
+content-hash = "fdebab27876e1cb562fc41868655eb0c4ba154bd870cc2be5b17d98df8eaf900"
diff --git a/pyproject.toml b/pyproject.toml
index e7b54e39..40839e69 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,7 +52,7 @@ pytest-mock = "^3.6.1"
 autopep8 = "^1.5.7"
 pytest-cov = "^2.12.1"
 flake8 = "^4.0.1"
-jinja2 = "3.1.4"
+jinja2 = "3.0.3"
 
 [tool.poetry.scripts]
 build_lightcurves = "vasttools.bin.build_lightcurves:main"