diff --git a/targets/ptfkit-py/pyproject.toml b/targets/ptfkit-py/pyproject.toml
index f01530b..81b3a28 100644
--- a/targets/ptfkit-py/pyproject.toml
+++ b/targets/ptfkit-py/pyproject.toml
@@ -5,11 +5,19 @@ build-backend = "scikit_build_core.build"
 [project]
 name = "ptfkit"
 dynamic = ["version"]
-description = "Pedotransfer functions for estimating soil hydraulic properties"
+description = "Collection of published pedotransfer functions for estimating soil hydraulic properties"
 readme = "README.md"
 license = "MIT"
 license-files = ["LICENSE"]
 requires-python = ">=3.11"
+keywords = [
+    "pedotransfer functions",
+    "soil hydraulic properties",
+    "soil water retention",
+    "hydraulic conductivity",
+    "soil science",
+    "hydrology",
+]
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Science/Research",
diff --git a/targets/ptfkit-rs/Cargo.toml b/targets/ptfkit-rs/Cargo.toml
index ef312ec..11e6587 100644
--- a/targets/ptfkit-rs/Cargo.toml
+++ b/targets/ptfkit-rs/Cargo.toml
@@ -2,11 +2,13 @@
 name = "ptfkit"
 version = "0.3.0"
 edition = "2024"
-description = "Pedotransfer functions for estimating soil hydraulic properties"
+description = "Collection of published pedotransfer functions for estimating soil hydraulic properties"
 license = "MIT"
 readme = "README.md"
 repository = "https://github.com/AgroDT/ptfkit"
 documentation = "https://docs.rs/ptfkit"
+keywords = ["pedotransfer", "soil", "hydrology", "soil-water", "hydraulic"]
+categories = ["science"]
 
 [features]
 default = ["inline"]