diff --git a/pyproject.toml b/pyproject.toml
index 0f5d9aa1cc..82f9c563bd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -115,6 +115,7 @@ dev = [
   "tabulate",
   "types-requests",
   "types-tabulate",
+  "hexdump",
 
   # this is only pinned since 5.15.11 is broken
   "pyqt5 ==5.15.2; platform_machine == 'x86_64'", # no aarch64 wheels for macOS/linux
diff --git a/uv.lock b/uv.lock
index 2797eee62f..57f8d9d7ee 100644
--- a/uv.lock
+++ b/uv.lock
@@ -766,6 +766,12 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/a8/4d/3cbfd81ed84db450dbe73a89afcd8bc405273918415649ac6683356afe92/gymnasium-0.29.1-py3-none-any.whl", hash = "sha256:61c3384b5575985bb7f85e43213bcb40f36fcdff388cae6bc229304c71f2843e", size = 953939 },
 ]
 
+[[distribution]]
+name = "hexdump"
+version = "3.3"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/55/b3/279b1d57fa3681725d0db8820405cdcb4e62a9239c205e4ceac4391c78e4/hexdump-3.3.zip", hash = "sha256:d781a43b0c16ace3f9366aade73e8ad3a7bd5137d58f0b45ab2d3f54876f20db", size = 12658 }
+
 [[distribution]]
 name = "humanfriendly"
 version = "10.0"
@@ -1537,6 +1543,7 @@ dev = [
     { name = "control" },
     { name = "dictdiffer" },
     { name = "flaky" },
+    { name = "hexdump" },
     { name = "inputs" },
     { name = "lru-dict" },
     { name = "matplotlib" },