diff --git a/pdm.lock b/pdm.lock
index 4bfb37c..eaa821e 100644
--- a/pdm.lock
+++ b/pdm.lock
@@ -5,26 +5,133 @@
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 summary = "Cross-platform colored terminal text."
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 ]
 
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-groups = ["dev"]
+groups = ["default", "dev"]
 marker = "python_version < \"3.11\""
 files = [
     {file = "exceptiongroup-1.2.1-py3-none-any.whl", hash = "sha256:5258b9ed329c5bbdd31a309f53cbfb0b155341807f6ff7606a1e801a891b29ad"},
@@ -36,7 +143,7 @@ name = "iniconfig"
 version = "2.0.0"
 requires_python = ">=3.7"
 summary = "brain-dead simple config-ini parsing"
-groups = ["dev"]
+groups = ["default", "dev"]
 files = [
     {file = "iniconfig-2.0.0-py3-none-any.whl", hash = "sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374"},
     {file = "iniconfig-2.0.0.tar.gz", hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3"},
@@ -94,7 +201,7 @@ name = "packaging"
 version = "24.1"
 requires_python = ">=3.8"
 summary = "Core utilities for Python packages"
-groups = ["dev"]
+groups = ["default", "dev"]
 files = [
     {file = "packaging-24.1-py3-none-any.whl", hash = "sha256:5b8f2217dbdbd2f7f384c41c628544e6d52f2d0f53c6d0c3ea61aa5d1d7ff124"},
     {file = "packaging-24.1.tar.gz", hash = "sha256:026ed72c8ed3fcce5bf8950572258698927fd1dbda10a5e981cdf0ac37f4f002"},
@@ -105,7 +212,7 @@ name = "pluggy"
 version = "1.5.0"
 requires_python = ">=3.8"
 summary = "plugin and hook calling mechanisms for python"
-groups = ["dev"]
+groups = ["default", "dev"]
 files = [
     {file = "pluggy-1.5.0-py3-none-any.whl", hash = "sha256:44e1ad92c8ca002de6377e165f3e0f1be63266ab4d554740532335b9d75ea669"},
     {file = "pluggy-1.5.0.tar.gz", hash = "sha256:2cffa88e94fdc978c4c574f15f9e59b7f4201d439195c3715ca9e2486f1d0cf1"},
@@ -116,7 +223,7 @@ name = "pytest"
 version = "8.2.2"
 requires_python = ">=3.8"
 summary = "pytest: simple powerful testing with Python"
-groups = ["dev"]
+groups = ["default", "dev"]
 dependencies = [
     "colorama; sys_platform == \"win32\"",
     "exceptiongroup>=1.0.0rc8; python_version < \"3.11\"",
@@ -130,12 +237,27 @@ files = [
     {file = "pytest-8.2.2.tar.gz", hash = "sha256:de4bb8104e201939ccdc688b27a89a7be2079b22e2bd2b07f806b6ba71117977"},
 ]
 
+[[package]]
+name = "pytest-cov"
+version = "5.0.0"
+requires_python = ">=3.8"
+summary = "Pytest plugin for measuring coverage."
+groups = ["default"]
+dependencies = [
+    "coverage[toml]>=5.2.1",
+    "pytest>=4.6",
+]
+files = [
+    {file = "pytest-cov-5.0.0.tar.gz", hash = "sha256:5837b58e9f6ebd335b0f8060eecce69b662415b16dc503883a02f45dfeb14857"},
+    {file = "pytest_cov-5.0.0-py3-none-any.whl", hash = "sha256:4f0764a1219df53214206bf1feea4633c3b558a2925c8b59f144f682861ce652"},
+]
+
 [[package]]
 name = "tomli"
 version = "2.0.1"
 requires_python = ">=3.7"
 summary = "A lil' TOML parser"
-groups = ["dev"]
+groups = ["default", "dev"]
 marker = "python_version < \"3.11\""
 files = [
     {file = "tomli-2.0.1-py3-none-any.whl", hash = "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc"},
diff --git a/pyproject.toml b/pyproject.toml
index 96c23fd..bf92a75 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,9 @@ description = "The pure python impl of the slh-das algorithm(based on fips205)."
 authors = [
     {name = "Colinxu2020", email = "colinxu2020@gmail.com"},
 ]
-dependencies = []
+dependencies = [
+    "pytest-cov>=5.0.0",
+]
 requires-python = ">=3.9"
 readme = "README.md"
 license = {text = "AGPL-3.0-or-later"}