diff --git a/.github/workflows/continuousintegration.yml b/.github/workflows/continuousintegration.yml
index 596e6eb..612af08 100644
--- a/.github/workflows/continuousintegration.yml
+++ b/.github/workflows/continuousintegration.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, "3.10", "3.11"]
+        python-version: [3.9, "3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v2
diff --git a/.readthedocs.yml b/.readthedocs.yml
index d8d5c35..2668ce0 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -5,6 +5,9 @@ build:
   tools:
     python: "3.11"
 
+sphinx:
+  configuration: docs/conf.py
+
 python:
   install:
     - requirements: docs/requirements.txt
diff --git a/ctaplot/io/dataset.py b/ctaplot/io/dataset.py
index b0eea41..0511edf 100644
--- a/ctaplot/io/dataset.py
+++ b/ctaplot/io/dataset.py
@@ -1,7 +1,8 @@
-import pkg_resources
 import os
 import sys
 import numpy as np
+from importlib.resources import files as importlib_files, as_file
+
 
 __all__ = ['get']
 
@@ -98,11 +99,18 @@ def get(resource_name):
     try:
         resource_path = find_resource(resource_name)
     except FileNotFoundError:
-        if not pkg_resources.resource_exists(__name__, resource_name):
+        # Check if resource exists using importlib.resources
+        try:
+            resource_ref = importlib_files(__name__) / resource_name
+            if resource_ref.is_file():
+                with as_file(resource_ref) as resource_path:
+                    return str(resource_path)
+            else:
+                raise FileNotFoundError("Couldn't find resource: '{}'"
+                                        .format(resource_name))
+        except (FileNotFoundError, AttributeError):
             raise FileNotFoundError("Couldn't find resource: '{}'"
                                     .format(resource_name))
-        else:
-            resource_path = pkg_resources.resource_filename(__name__, resource_name)
     return resource_path
 
 
@@ -120,8 +128,19 @@ def find_resource(resource_name):
     str - absolute path to the resource
     """
     # If ctaplot is installed via python setup.py develop, data files stay in share
-    share_dir = os.path.join(pkg_resources.resource_filename('ctaplot', ''), '../share/')
-    gammaboard_dir = os.path.join(pkg_resources.resource_filename('ctaplot', ''), 'gammaboard/')
+    try:
+        # Get the ctaplot package directory using importlib.resources
+        ctaplot_ref = importlib_files('ctaplot')
+        with as_file(ctaplot_ref) as ctaplot_path:
+            share_dir = os.path.join(str(ctaplot_path), '../share/')
+            gammaboard_dir = os.path.join(str(ctaplot_path), 'gammaboard/')
+    except (ImportError, FileNotFoundError):
+        # Fallback if importlib.resources doesn't work
+        import ctaplot
+        ctaplot_path = os.path.dirname(ctaplot.__file__)
+        share_dir = os.path.join(ctaplot_path, '../share/')
+        gammaboard_dir = os.path.join(ctaplot_path, 'gammaboard/')
+    
     resources_dirs = [share_dir, gammaboard_dir]
     for res_dir in resources_dirs:
         for root, dirs, files in os.walk(res_dir):
@@ -156,7 +175,7 @@ def load_any_resource(filename):
         try:
             data = np.loadtxt(get(filename), skiprows=sr, unpack=True)
             break
-        except:
+        except Exception:
             sr += 1
 
     return data
diff --git a/environment.yml b/environment.yml
index e728b31..b2652b9 100644
--- a/environment.yml
+++ b/environment.yml
@@ -9,7 +9,7 @@ dependencies:
   - matplotlib
   - nbsphinx
   - numpy
-  - python >= 3.6
+  - python >= 3.9
   - pandas
   - pyyaml
   - pytables
diff --git a/setup.cfg b/setup.cfg
index 655f2b1..deec55a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -9,4 +9,4 @@ github_project = cta-observatory/cta-plot
 license = MIT
 
 [options]
-python_requires = >=3.6
+python_requires = >=3.9
diff --git a/setup.py b/setup.py
index e789330..0d919e6 100644
--- a/setup.py
+++ b/setup.py
@@ -45,6 +45,9 @@ def get_property(prop, project):
     classifiers=[
         'Intended Audience :: Science/Research',
         'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Topic :: Scientific/Engineering :: Astronomy',
     ],
     data_files=[('ctaplot', dataset), ],