diff --git a/poetry.lock b/poetry.lock
index c0a2d2d..d4735df 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,8 +1,30 @@
-package = []
+[[package]]
+category = "main"
+description = "Cross-platform lib for process and system monitoring in Python."
+name = "psutil"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "5.7.2"
+
+[package.extras]
+test = ["ipaddress", "mock", "unittest2", "enum34", "pywin32", "wmi"]
 
 [metadata]
-content-hash = "ae1f216c71b9b712a5c479d19bf075b718c35d9248fd89cb1eb7624528ec5ad1"
+content-hash = "258639373f0e151ea9f8efb81c3e413c2c8886631570411344520b408e2eb8ab"
 lock-version = "1.0"
 python-versions = "^3.6"
 
 [metadata.files]
+psutil = [
+    {file = "psutil-5.7.2-cp27-none-win32.whl", hash = "sha256:f2018461733b23f308c298653c8903d32aaad7873d25e1d228765e91ae42c3f2"},
+    {file = "psutil-5.7.2-cp27-none-win_amd64.whl", hash = "sha256:66c18ca7680a31bf16ee22b1d21b6397869dda8059dbdb57d9f27efa6615f195"},
+    {file = "psutil-5.7.2-cp35-cp35m-win32.whl", hash = "sha256:5e9d0f26d4194479a13d5f4b3798260c20cecf9ac9a461e718eb59ea520a360c"},
+    {file = "psutil-5.7.2-cp35-cp35m-win_amd64.whl", hash = "sha256:4080869ed93cce662905b029a1770fe89c98787e543fa7347f075ade761b19d6"},
+    {file = "psutil-5.7.2-cp36-cp36m-win32.whl", hash = "sha256:d8a82162f23c53b8525cf5f14a355f5d1eea86fa8edde27287dd3a98399e4fdf"},
+    {file = "psutil-5.7.2-cp36-cp36m-win_amd64.whl", hash = "sha256:0ee3c36428f160d2d8fce3c583a0353e848abb7de9732c50cf3356dd49ad63f8"},
+    {file = "psutil-5.7.2-cp37-cp37m-win32.whl", hash = "sha256:ff1977ba1a5f71f89166d5145c3da1cea89a0fdb044075a12c720ee9123ec818"},
+    {file = "psutil-5.7.2-cp37-cp37m-win_amd64.whl", hash = "sha256:a5b120bb3c0c71dfe27551f9da2f3209a8257a178ed6c628a819037a8df487f1"},
+    {file = "psutil-5.7.2-cp38-cp38-win32.whl", hash = "sha256:10512b46c95b02842c225f58fa00385c08fa00c68bac7da2d9a58ebe2c517498"},
+    {file = "psutil-5.7.2-cp38-cp38-win_amd64.whl", hash = "sha256:68d36986ded5dac7c2dcd42f2682af1db80d4bce3faa126a6145c1637e1b559f"},
+    {file = "psutil-5.7.2.tar.gz", hash = "sha256:90990af1c3c67195c44c9a889184f84f5b2320dce3ee3acbd054e3ba0b4a7beb"},
+]
diff --git a/pyproject.toml b/pyproject.toml
index 2c30e60..a81acbf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ license = "Apache-2.0"
 
 [tool.poetry.dependencies]
 python = "^3.6"
+psutil = "^5.7.0"
 
 [tool.poetry.dev-dependencies]