diff --git a/poetry.lock b/poetry.lock
index 74373bb..1c55440 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.4.0 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.4.1 and should not be changed by hand.
 
 [[package]]
 name = "aiohttp"
@@ -1398,14 +1398,14 @@ iso8601 = "*"
 
 [[package]]
 name = "rlaphoenix-pymp4"
-version = "1.5.0"
-description = "A Python parser for MP4 boxes"
+version = "1.4.0"
+description = "Python parser for MP4 boxes"
 category = "main"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+python-versions = ">=3.7,<4.0"
 files = [
-    {file = "rlaphoenix_pymp4-1.5.0-py2.py3-none-any.whl", hash = "sha256:2309389dd6087519a1eed8b148d586b5d7f12c9210c8f588b0aa623827d75d35"},
-    {file = "rlaphoenix_pymp4-1.5.0.tar.gz", hash = "sha256:6aaa85a0503c22f8acb0ea1b334c6ad69c3f0591e78520453b0404648d5629f6"},
+    {file = "rlaphoenix_pymp4-1.4.0-py3-none-any.whl", hash = "sha256:dbe15f8b5721066b497dd853393e4a8ee28c2ade1656901128e965bb9a575bd5"},
+    {file = "rlaphoenix_pymp4-1.4.0.tar.gz", hash = "sha256:aca6094782e4ba8cbfa0f131a892dd97c15eb4db14802bc8b42fc43698512d13"},
 ]
 
 [package.dependencies]
@@ -1745,4 +1745,4 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.9.0,<3.12"
-content-hash = "83608be51420040e95fd8981f7dc774cb60a6db1145a70ad0ed2b08d29bf56f6"
+content-hash = "0f23d2cc6ed4e674aba0e1e8775b53d41a053143016cf38d4c91ed2ace4e724f"
diff --git a/pyproject.toml b/pyproject.toml
index 8fe605c..1823202 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -44,7 +44,7 @@ PyYAML = "^6.0"
 requests = { extras = ["socks"], version = "^2.28.2" }
 rich = "^13.3.1"
 "rlaphoenix.m3u8" = "^3.4.0"
-rlaphoenix-pymp4 = "^1.5.0"
+rlaphoenix-pymp4 = "^1.4.0"
 "ruamel.yaml" = "^0.17.21"
 sortedcontainers = "^2.4.0"
 subtitle-filter = "^1.4.4"