diff --git a/lib/galaxy/dependencies/dev-requirements.txt b/lib/galaxy/dependencies/dev-requirements.txt
index 4eaa9af59dd8..2ef5e06b919b 100644
--- a/lib/galaxy/dependencies/dev-requirements.txt
+++ b/lib/galaxy/dependencies/dev-requirements.txt
@@ -32,7 +32,7 @@ cycler==0.11.0 ; python_version >= "3.7" and python_version < "3.12"
 darker==1.7.2 ; python_version >= "3.7" and python_version < "3.12"
 defusedxml==0.7.1 ; python_version >= "3.7" and python_version < "3.12"
 deprecated==1.2.14 ; python_version >= "3.7" and python_version < "3.12"
-docutils==0.19 ; python_version >= "3.7" and python_version < "3.12"
+docutils==0.18.1 ; python_version >= "3.7" and python_version < "3.12"
 exceptiongroup==1.1.3 ; python_version >= "3.7" and python_version < "3.12"
 filelock==3.12.2 ; python_version >= "3.7" and python_version < "3.12"
 fluent-logger==0.10.0 ; python_version >= "3.7" and python_version < "3.12"
@@ -134,7 +134,7 @@ six==1.16.0 ; python_version >= "3.7" and python_version < "3.12"
 sniffio==1.3.0 ; python_version >= "3.7" and python_version < "3.12"
 snowballstemmer==2.2.0 ; python_version >= "3.7" and python_version < "3.12"
 sortedcontainers==2.4.0 ; python_version >= "3.7" and python_version < "3.12"
-sphinx-rtd-theme==2.0.0rc2 ; python_version >= "3.7" and python_version < "3.12"
+sphinx-rtd-theme==1.3.0 ; python_version >= "3.7" and python_version < "3.12"
 sphinx==5.3.0 ; python_version >= "3.7" and python_version < "3.12"
 sphinxcontrib-applehelp==1.0.2 ; python_version >= "3.7" and python_version < "3.12"
 sphinxcontrib-devhelp==1.0.2 ; python_version >= "3.7" and python_version < "3.12"
diff --git a/lib/galaxy/dependencies/pinned-requirements.txt b/lib/galaxy/dependencies/pinned-requirements.txt
index cc59743b0222..af8f7fb5a32f 100644
--- a/lib/galaxy/dependencies/pinned-requirements.txt
+++ b/lib/galaxy/dependencies/pinned-requirements.txt
@@ -58,7 +58,7 @@ deprecation==2.1.0 ; python_version >= "3.7" and python_version < "3.12"
 dictobj==0.4 ; python_version >= "3.7" and python_version < "3.12"
 dnspython==2.3.0 ; python_version >= "3.7" and python_version < "3.12"
 docopt==0.6.2 ; python_version >= "3.7" and python_version < "3.12"
-docutils==0.19 ; python_version >= "3.7" and python_version < "3.12"
+docutils==0.18.1 ; python_version >= "3.7" and python_version < "3.12"
 dparse==0.6.3 ; python_version >= "3.7" and python_version < "3.12"
 ecdsa==0.18.0 ; python_version >= "3.7" and python_version < "3.12"
 edam-ontology==1.25.2 ; python_version >= "3.7" and python_version < "3.12"
diff --git a/pyproject.toml b/pyproject.toml
index 9429d247ab86..3a74fe4a38ca 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -152,7 +152,7 @@ responses = "*"
 selenium = "*"
 seletools = "*"
 Sphinx = ">=4.0"  # support docutils 0.17
-sphinx_rtd_theme = ">=1.0.0"
+sphinx-rtd-theme = ">=1.0.0,<2"  # https://github.com/python-poetry/poetry/issues/8194
 statsd = "*"
 testfixtures = "*"
 tuspy = "*"