diff --git a/.github/workflows/ci_tests.yaml b/.github/workflows/ci_tests.yaml
index 351f918620d..0c874fdac77 100644
--- a/.github/workflows/ci_tests.yaml
+++ b/.github/workflows/ci_tests.yaml
@@ -56,7 +56,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.10', '3.13']
+        python-version: ['3.11', '3.13']
         os: [ubuntu-latest, macos-latest, windows-latest]
         # Is it a draft Pull Request (true or false)?
         isDraft:
@@ -68,8 +68,8 @@ jobs:
           - os: windows-latest
             isDraft: true
         include:
-          # Python 3.10 + core packages (minimum supported versions) + optional packages (minimum supported versions if any)
-          - python-version: '3.10'
+          # Python 3.11 + core packages (minimum supported versions) + optional packages (minimum supported versions if any)
+          - python-version: '3.11'
             numpy-version: '1.24'
             pandas-version: '=2.0'
             xarray-version: '=2023.04'
@@ -80,9 +80,9 @@ jobs:
             pandas-version: ''
             xarray-version: ''
             optional-packages: ' contextily geopandas>=1.0 ipython pyarrow rioxarray sphinx-gallery'
-          # Python 3.11 + core packages (Linux only)
+          # Python 3.12 + core packages (Linux only)
           - os: 'ubuntu-latest'
-            python-version: '3.11'
+            python-version: '3.12'
             numpy-version: ''
             pandas-version: ''
             xarray-version: ''
diff --git a/.github/workflows/ci_tests_legacy.yaml b/.github/workflows/ci_tests_legacy.yaml
index b927e34ebc0..d8195e8fe17 100644
--- a/.github/workflows/ci_tests_legacy.yaml
+++ b/.github/workflows/ci_tests_legacy.yaml
@@ -59,7 +59,7 @@ jobs:
               - conda-forge
               - nodefaults
           create-args: >-
-            python=3.10
+            python=3.11
             gmt=${{ matrix.gmt_version }}
             ghostscript<10
             numpy<2
diff --git a/environment.yml b/environment.yml
index 3b1bcd6a5e3..c9a9932f596 100644
--- a/environment.yml
+++ b/environment.yml
@@ -3,7 +3,7 @@ channels:
     - conda-forge
     - nodefaults
 dependencies:
-    - python>=3.10
+    - python>=3.11
     # Required dependencies
     - gmt=6.5.0
     - ghostscript=10.04.0
diff --git a/pygmt/tests/test_clib_put_vector.py b/pygmt/tests/test_clib_put_vector.py
index 968e09bf87c..cad77ba59cf 100644
--- a/pygmt/tests/test_clib_put_vector.py
+++ b/pygmt/tests/test_clib_put_vector.py
@@ -126,7 +126,7 @@ def test_put_vector_string_dtype():
             "2021-02-03T00:00:00",
             "2021-02-03T04:00:00",
             "2021-02-03T04:05:06",
-            f"{datetime.datetime.now(tz=datetime.timezone.utc).strftime('%Y-%m-%d')}T04:50:06",
+            f"{datetime.datetime.now(tz=datetime.UTC).strftime('%Y-%m-%d')}T04:50:06",
         ],
     ]
 
diff --git a/pyproject.toml b/pyproject.toml
index 0f871dbcfd2..184c2dbdece 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "pygmt"
 description = "A Python interface for the Generic Mapping Tools"
 readme = "README.md"
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 authors = [{name = "The PyGMT Developers", email = "pygmt.team@gmail.com"}]
 keywords = [
     "cartography",
@@ -24,7 +24,6 @@ classifiers = [
     "Intended Audience :: Education",
     "Topic :: Scientific/Engineering",
     "Topic :: Software Development :: Libraries",
-    "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",