diff --git a/.github/workflows/Test.yml b/.github/workflows/Test.yml
index 0d65bc5..04f6a93 100644
--- a/.github/workflows/Test.yml
+++ b/.github/workflows/Test.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
       - uses: actions/checkout@v4
diff --git a/README.md b/README.md
index cf9e286..c1bc919 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
    > borders.
 > 2. Rust use lazy init, so first calling will be a little slow.
 > 3. Use about 40MB memory.
-> 4. It's tested under Python 3.9+ but support 3.7+(noqa).
+> 4. It's tested under Python 3.9+ but support 3.8+(noqa).
 
 ## Usage
 
diff --git a/pyproject.toml b/pyproject.toml
index 899f536..9af7d47 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,6 @@ classifiers = [
   "Programming Language :: Rust",
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
-  "Programming Language :: Python :: 3.7",
   "Programming Language :: Python :: 3.8",
   "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
@@ -17,7 +16,7 @@ classifiers = [
 dependencies = []
 description = "Probably the fastest Python package to convert longitude/latitude to timezone name"
 name = "tzfpy"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 
 [project.optional-dependencies]
 pytz = ["pytz>=2023.3"]
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 2d90e38..98e7700 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,4 +1,4 @@
-citiespy==0.5.3
+citiespy==0.5.4
 maturin==1.4.0
 pytest
 pytest-benchmark