diff --git a/poetry.lock b/poetry.lock
index 8c1ed92e..4e8da91a 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 1.8.4 and should not be changed by hand.
 
 [[package]]
 name = "altgraph"
@@ -1827,13 +1827,13 @@ six = ">=1.5"
 
 [[package]]
 name = "python-statemachine"
-version = "2.4.0"
+version = "2.3.6"
 description = "Python Finite State Machines made easy."
 optional = false
 python-versions = ">=3.7"
 files = [
-    {file = "python_statemachine-2.4.0-py3-none-any.whl", hash = "sha256:c9efc4ca9e2627b981ab2b6b41af294fe30ae6e7f0ca927b2cd368ea3f1c896c"},
-    {file = "python_statemachine-2.4.0.tar.gz", hash = "sha256:1f0cce643c9d17b130dbeb369c293c97d6d0dc25931d45bc8ff667cd7cd67747"},
+    {file = "python_statemachine-2.3.6-py3-none-any.whl", hash = "sha256:0001b02cbe2f5b2420c423b5b3e3a33915447ac6d9735219c929e2378d454f5f"},
+    {file = "python_statemachine-2.3.6.tar.gz", hash = "sha256:9cb4040ca7f2158d3cd46f36a77b420b6ef95a90223928a7f3cab232a70bd560"},
 ]
 
 [package.extras]
@@ -2283,4 +2283,4 @@ watchmedo = ["PyYAML (>=3.10)"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.12,<3.13"
-content-hash = "825345c2903cde64e1a13c75f12ebca744f875898aac9fef31e4fb675e997eec"
+content-hash = "7a54a848a9d2c6b236161f69ec75810b400aece04f77659b7da8eebfd6aa6c80"
diff --git a/pyproject.toml b/pyproject.toml
index 1766ded3..ce57e885 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ pyyaml = "^6.0"
 schema = "^0.7.7"
 pyserial = "^3.5"
 beautifulsoup4 = "^4.12.3"
-python-statemachine = "^2.4.0"
+python-statemachine = "<2.4.0"
 numpy = "^2.1.3"
 decorator = "^5.1.1"
 pycsvy = "^0.2.2"