diff --git a/pyproject.toml b/pyproject.toml
index d2f18de..06190b2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,12 +12,12 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Topic :: Scientific/Engineering",
 ]
-dependencies = ["numpy", "scipy", "bec_lib", "h5py", "ophyd_devices"]
+dependencies = ["numpy ~= 1.24", "scipy", "bec_lib ~=2.31", "h5py", "ophyd_devices ~= 1.9"]
 
 [project.optional-dependencies]
 dev = [
-    "bec_server",
-    "black",
+    "bec_server ~= 2.31",
+    "black ~= 24.0",
     "isort",
     "coverage",
     "pylint",