diff --git a/datacite/schema31.py b/datacite/schema31.py
index cc5a054..cd23022 100644
--- a/datacite/schema31.py
+++ b/datacite/schema31.py
@@ -10,7 +10,7 @@
 
 """DataCite v3.1 JSON to XML transformations."""
 
-import pkg_resources
+import importlib.resources as importlib_resources
 from lxml import etree
 from lxml.builder import E
 
@@ -37,7 +37,7 @@
 }
 
 validator = validator_factory(
-    pkg_resources.resource_filename("datacite", "schemas/datacite-v3.1.json")
+    importlib_resources.files('datacite') / 'schemas/datacite-v3.1.json'
 )
 
 
diff --git a/datacite/schema40.py b/datacite/schema40.py
index e19927b..68508df 100644
--- a/datacite/schema40.py
+++ b/datacite/schema40.py
@@ -10,7 +10,7 @@
 
 """DataCite v4.0 JSON to XML transformations."""
 
-import pkg_resources
+import importlib.resources as importlib_resources
 from lxml import etree
 from lxml.builder import E
 
@@ -37,7 +37,7 @@
 }
 
 validator = validator_factory(
-    pkg_resources.resource_filename("datacite", "schemas/datacite-v4.0.json")
+    importlib_resources.files("datacite", "schemas/datacite-v4.0.json")
 )
 
 
diff --git a/datacite/schema41.py b/datacite/schema41.py
index 66fd165..b10a7a0 100644
--- a/datacite/schema41.py
+++ b/datacite/schema41.py
@@ -10,7 +10,7 @@
 
 """DataCite v4.1 JSON to XML transformations."""
 
-import pkg_resources
+import importlib.resources as importlib_resources
 from lxml import etree
 from lxml.builder import E
 
@@ -37,7 +37,7 @@
 }
 
 validator = validator_factory(
-    pkg_resources.resource_filename("datacite", "schemas/datacite-v4.1.json")
+    importlib_resources.files("datacite", "schemas/datacite-v4.1.json")
 )
 
 
diff --git a/datacite/schema42.py b/datacite/schema42.py
index bb57476..0953b42 100644
--- a/datacite/schema42.py
+++ b/datacite/schema42.py
@@ -11,7 +11,7 @@
 
 """DataCite v4.2 JSON to XML transformations."""
 
-import pkg_resources
+import importlib.resources as importlib_resources
 from lxml import etree
 from lxml.builder import E
 
@@ -38,7 +38,7 @@
 }
 
 validator = validator_factory(
-    pkg_resources.resource_filename("datacite", "schemas/datacite-v4.2.json")
+    importlib_resources.files("datacite", "schemas/datacite-v4.2.json")
 )
 
 
diff --git a/datacite/schema43.py b/datacite/schema43.py
index 5bef9f0..785cea5 100644
--- a/datacite/schema43.py
+++ b/datacite/schema43.py
@@ -11,7 +11,7 @@
 
 """DataCite v4.3 JSON to XML transformations."""
 
-import pkg_resources
+import importlib.resources as importlib_resources
 from lxml import etree
 from lxml.builder import E
 
@@ -38,7 +38,7 @@
 }
 
 validator = validator_factory(
-    pkg_resources.resource_filename("datacite", "schemas/datacite-v4.3.json")
+    importlib_resources.files("datacite", "schemas/datacite-v4.3.json")
 )