diff --git a/Cargo.toml b/Cargo.toml
index b376ed93fc..ef5c09adea 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,6 +5,7 @@ version = "0.0.0"
 description = "Command-line interface for the wasmtime crate"
 license = "Apache-2.0 WITH LLVM-exception"
 documentation = "https://cranelift.readthedocs.io/"
+categories = ["wasm"]
 repository = "https://github.com/CraneStation/wasmtime"
 publish = false
 
diff --git a/lib/environ/Cargo.toml b/lib/environ/Cargo.toml
index 1e36c3f05d..87d2ab391e 100644
--- a/lib/environ/Cargo.toml
+++ b/lib/environ/Cargo.toml
@@ -5,6 +5,7 @@ authors = ["The Cranelift Project Developers"]
 description = "Standalone environment support for WebAsssembly code in Cranelift"
 repository = "https://github.com/CraneStation/wasmtime"
 documentation = "https://docs.rs/wasmtime-environ/"
+categories = ["wasm"]
 license = "Apache-2.0 WITH LLVM-exception"
 readme = "README.md"
 
diff --git a/lib/execute/Cargo.toml b/lib/execute/Cargo.toml
index 7f21748d6d..2dd1e48735 100644
--- a/lib/execute/Cargo.toml
+++ b/lib/execute/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 authors = ["The Cranelift Project Developers"]
 publish = false
 description = "JIT-style execution for WebAsssembly code in Cranelift"
+categories = ["wasm"]
 repository = "https://github.com/CraneStation/wasmtime"
 license = "Apache-2.0 WITH LLVM-exception"
 
diff --git a/lib/obj/Cargo.toml b/lib/obj/Cargo.toml
index 28668ab0d9..85b92e72ae 100644
--- a/lib/obj/Cargo.toml
+++ b/lib/obj/Cargo.toml
@@ -4,6 +4,7 @@ version = "0.0.0"
 authors = ["The Cranelift Project Developers"]
 publish = false
 repository = "https://github.com/CraneStation/wasmtime"
+categories = ["wasm"]
 license = "Apache-2.0 WITH LLVM-exception"
 
 [dependencies]