diff --git a/pyproject.toml b/pyproject.toml
index f1b315f..3e91e1d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,7 @@ classifiers = [
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: Implementation :: CPython",
     "Topic :: Scientific/Engineering",
+    "Topic :: Scientific/Engineering :: Instrument Drivers",
     "Topic :: System :: Hardware",
 ]
 include = ["nisync/*"]