diff --git a/pyproject.toml b/pyproject.toml
index 498cd38..ff73012 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ lint = [
   "ruff>=0.9.5"
 ]
 test = [
-  "betamax >=0.8, <0.9",
+  "betamax >=0.8, <0.10",
   "coverage>=7.6.10",
   "pytest>=8.3.4",
   "urllib3 ==1.*"
diff --git a/uv.lock b/uv.lock
index a0f3ea3..850686f 100644
--- a/uv.lock
+++ b/uv.lock
@@ -322,7 +322,7 @@ lint = [
     { name = "ruff", specifier = ">=0.9.5" },
 ]
 test = [
-    { name = "betamax", specifier = ">=0.8,<0.9" },
+    { name = "betamax", specifier = ">=0.8,<0.10" },
     { name = "coverage", specifier = ">=7.6.10" },
     { name = "pytest", specifier = ">=8.3.4" },
     { name = "urllib3", specifier = "==1.*" },