diff --git a/pyproject.toml b/pyproject.toml
index 7512d0e..3b8172d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,11 +55,11 @@ classifiers = [
 ]
 
 dependencies = [
-    "dbrownell_Common",
-    "GitPython == 3.*",
-    "jsonschema == 4.*",
-    "rtyaml == 1.*",
-    "semantic_version == 2.*",
+    "dbrownell_Common == 0.*",
+    "GitPython ~= 3.1",
+    "jsonschema ~= 4.21",
+    "rtyaml ~= 1.0",
+    "semantic_version ~= 2.10",
 ]
 
 dynamic = [
@@ -70,13 +70,13 @@ readme = "README.md"
 
 [project.optional-dependencies]
 dev = [
-    "dbrownell_DevTools",
+    "dbrownell_DevTools == 0.*",
 ]
 
 package = [
-    "build == 1.*",
-    "cx_Freeze == 6.*",
-    "twine == 4.*",
+    "build ~= 1.2",
+    "cx_Freeze ~= 6.15",
+    "twine ~= 4.0",
 ]
 
 [project.scripts]