diff --git a/CHANGES b/CHANGES
index 8a9f5079223..7c2d5ce2962 100644
--- a/CHANGES
+++ b/CHANGES
@@ -31,6 +31,8 @@ $ pipx install --suffix=@next 'tmuxp' --pip-args '\--pre' --force
   - Clean up CodeQL
 
 - Bump poetry 1.1.x -> 1.2.x
+- Bump libtmux 0.15.1 -> 0.15.3 (#821, pytest plugin improvements, root-level
+  conftest.py)
 
 ## tmuxp 1.15.0 (2022-09-11)
 
diff --git a/poetry.lock b/poetry.lock
index b6fe76ed78f..0b06ddbfa79 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -299,7 +299,7 @@ PyYAML = ">=3.13,<6"
 
 [[package]]
 name = "libtmux"
-version = "0.15.2"
+version = "0.15.3"
 description = "Typed scripting library / ORM / API wrapper for tmux"
 category = "main"
 optional = false
@@ -984,7 +984,7 @@ test = []
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "05a94b86658a0c6883860afe0fc58b6272f9938b5999ebd0df89e4702a01c291"
+content-hash = "845705d13f264d148b745bfef9e7a83003a0e7dab47b0dc146d6776710dd91c1"
 
 [metadata.files]
 aafigure = [
@@ -1156,8 +1156,8 @@ kaptan = [
     {file = "kaptan-0.5.12.tar.gz", hash = "sha256:1abd1f56731422fce5af1acc28801677a51e56f5d3c3e8636db761ed143c3dd2"},
 ]
 libtmux = [
-    {file = "libtmux-0.15.2-py3-none-any.whl", hash = "sha256:5a6ed94648ec6f29ac56ee73f3953d8b23c29a50608065f22ec2f32cff8ec508"},
-    {file = "libtmux-0.15.2.tar.gz", hash = "sha256:d732973fbc0068d03615e65c05bb05f48b9ce39e4d66a0ff63d6d7b04966a9cb"},
+    {file = "libtmux-0.15.3-py3-none-any.whl", hash = "sha256:47447965dadcfcbad8805c01ad8a1a767a69375425ad4f1b5780aeed022591a1"},
+    {file = "libtmux-0.15.3.tar.gz", hash = "sha256:e26f47f9f03c0c41f4032714a2c24485f0f8b5d96b2999054e249b8376083b13"},
 ]
 livereload = [
     {file = "livereload-2.6.3.tar.gz", hash = "sha256:776f2f865e59fde56490a56bcc6773b6917366bce0c267c60ee8aaf1a0959869"},
diff --git a/pyproject.toml b/pyproject.toml
index 5fbe8c80219..ac1acd07f57 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -48,7 +48,7 @@ tmuxp = 'tmuxp:cli.cli'
 python = "^3.7"
 click = "~8"
 kaptan = ">=0.5.10"
-libtmux = "~0.15.1"
+libtmux = "~0.15.3"
 colorama = ">=0.3.9"
 
 [tool.poetry.dev-dependencies]