diff --git a/engine/preprocessor/Cargo.toml b/engine/preprocessor/Cargo.toml
index 9420f84..432c744 100644
--- a/engine/preprocessor/Cargo.toml
+++ b/engine/preprocessor/Cargo.toml
@@ -3,8 +3,7 @@ name = "afrim-preprocessor"
 version = "0.5.1"
 edition = "2021"
 description = "A preprocessor to process keyboard events for an input method."
-keywords = ["ime", "preprocessor", "keyboard"]
-category = ["text-processing"]
+keywords = ["ime", "processor", "keyboard"]
 repository = "https://github.com/pythonbrad/afrim"
 license = "MIT"
 readme = "README.md"
diff --git a/engine/translator/Cargo.toml b/engine/translator/Cargo.toml
index 55b342a..e7e8939 100644
--- a/engine/translator/Cargo.toml
+++ b/engine/translator/Cargo.toml
@@ -4,7 +4,6 @@ version = "0.1.2"
 edition = "2021"
 description = "Manage the predication system of the afrim input method."
 keywords = ["auto-complete", "ime", "predication"]
-category = ["text-processing"]
 repository = "https://github.com/pythonbrad/afrim"
 license = "MIT"
 readme = "README.md"
diff --git a/memory/Cargo.toml b/memory/Cargo.toml
index 0958cb7..7fe7e6b 100644
--- a/memory/Cargo.toml
+++ b/memory/Cargo.toml
@@ -4,8 +4,6 @@ version = "0.3.2"
 edition = "2021"
 description = "Make the handle of sequential codes easier for an input method."
 keywords = ["ime", "memory", "data-structure"]
-category = ["text-processing"]
-
 repository = "https://github.com/pythonbrad/afrim"
 license = "MIT"
 readme = "README.md"
diff --git a/service/Cargo.toml b/service/Cargo.toml
index 192aca4..21e8d6b 100644
--- a/service/Cargo.toml
+++ b/service/Cargo.toml
@@ -4,7 +4,6 @@ version = "0.5.2"
 edition = "2021"
 description = "Core library of the afrim input method."
 keywords = ["ime", "keyboard"]
-category = ["text-processing"]
 repository = "https://github.com/pythonbrad/afrim"
 license = "MIT"
 readme = "../README.md"