diff --git a/pyproject.toml b/pyproject.toml
index 03a27d74..b10f88aa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -200,7 +200,7 @@ dev = [
     # pip>=26.1.2 fixes PYSEC-2026-196
     "pip>=26.3",
     # virtualenv>=21.7.13 fixes PYSEC-2026-4011, PYSEC-2026-4012, PYSEC-2026-4013, PYSEC-2026-4014
-    "virtualenv>=21.15.2",
+    "virtualenv>=21.15.5",
 ]
 docs = [
     "mkdocs>=1.5.0",
diff --git a/uv.lock b/uv.lock
index d3d6e311..fd2e6eee 100644
--- a/uv.lock
+++ b/uv.lock
@@ -2694,7 +2694,7 @@ dev = [
     { name = "pytest-cov", specifier = ">=6.0.0" },
     { name = "pytest-mock", specifier = ">=3.17.0" },
     { name = "ruff", specifier = ">=0.17.4" },
-    { name = "virtualenv", specifier = ">=21.15.2" },
+    { name = "virtualenv", specifier = ">=21.15.5" },
 ]
 docs = [
     { name = "mkdocs", specifier = ">=1.5.0" },
@@ -4555,7 +4555,7 @@ wheels = [
 
 [[package]]
 name = "virtualenv"
-version = "21.15.2"
+version = "21.15.6"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "distlib" },
@@ -4564,9 +4564,9 @@ dependencies = [
     { name = "platformdirs" },
     { name = "python-discovery" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/38/9e/40c7098240cedd3a2f32e42a74b35c4563c617fdd7e41ae6268d4fdd8915/virtualenv-21.15.2.tar.gz", hash = "sha256:dbd886e6e5689eb4dde6a9bbc478ad14b4fc8ed0852690d8273ccfb8c467f635", size = 5520597, upload-time = "2026-10-30T19:18:04.759Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/b3/bd/e40ad2df6a9efc1f859ea23d63fd7371cff68252833f182ca9af819bb4d3/virtualenv-21.15.6.tar.gz", hash = "sha256:c8b65c7d206ca6ef18de9352c160b3f04f66fff9f6b0ec8fd31f14688eba52c4", size = 5641659, upload-time = "2026-11-06T18:17:32.46Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/f7/d8/09c9d6df253b2016312dd5ccbb962dfa86a5202f2452604b52e0a9844661/virtualenv-21.15.2-py3-none-any.whl", hash = "sha256:fb8c62c7c328e0238061c721068f06b7bc6bd10f7a0f5987195cef1008837ee6", size = 5559530, upload-time = "2026-10-30T19:18:01.134Z" },
+    { url = "https://files.pythonhosted.org/packages/0a/63/fd514dee3159f74a96ac01beb8f460b65e4ef0b972f63f4fe9f0cd2aa0e3/virtualenv-21.15.6-py3-none-any.whl", hash = "sha256:4b99ab9b95ff11043939bb4cad2fa0449175fa5a478372864f62160cb6c1a7ed", size = 5680963, upload-time = "2026-11-06T18:17:30.128Z" },
 ]
 
 [[package]]