diff --git a/python/lib/dependabot/python/update_checker.rb b/python/lib/dependabot/python/update_checker.rb
index 0d1f1b43922..0113a8b7153 100644
--- a/python/lib/dependabot/python/update_checker.rb
+++ b/python/lib/dependabot/python/update_checker.rb
@@ -234,8 +234,8 @@ def updated_version_req_lower_bound
                       .reject { |req_string| req_string.start_with?("<") }
                       .select { |req_string| req_string.match?(VERSION_REGEX) }
                       .map { |req_string| req_string.match(VERSION_REGEX) }
-                      .select { |version| Gem::Version.correct?(version) }
-                      .max_by { |version| Gem::Version.new(version) }
+                      .select { |version| Python::Version.correct?(version) }
+                      .max_by { |version| Python::Version.new(version) }
 
         ">=#{version_for_requirement || 0}"
       end
diff --git a/python/lib/dependabot/python/version.rb b/python/lib/dependabot/python/version.rb
index 3eaaba4190a..1dbb88b1544 100644
--- a/python/lib/dependabot/python/version.rb
+++ b/python/lib/dependabot/python/version.rb
@@ -214,6 +214,38 @@ def lowest_prerelease_suffix
         "dev0"
       end
 
+      sig { override.returns(T::Array[String]) }
+      def ignored_patch_versions
+        parts = release_segment # e.g [1,2,3] if version is 1.2.3-alpha3
+        version_parts = parts.fill(0, parts.length...2)
+        upper_parts = version_parts.first(1) + [version_parts[1].to_i + 1] + [lowest_prerelease_suffix]
+        lower_bound = "> #{self}"
+        upper_bound = "< #{upper_parts.join('.')}"
+
+        ["#{lower_bound}, #{upper_bound}"]
+      end
+
+      sig { override.returns(T::Array[String]) }
+      def ignored_minor_versions
+        parts = release_segment # e.g [1,2,3] if version is 1.2.3-alpha3
+        version_parts = parts.fill(0, parts.length...2)
+        lower_parts = version_parts.first(1) + [version_parts[1].to_i + 1] + [lowest_prerelease_suffix]
+        upper_parts = version_parts.first(0) + [version_parts[0].to_i + 1] + [lowest_prerelease_suffix]
+        lower_bound = ">= #{lower_parts.join('.')}"
+        upper_bound = "< #{upper_parts.join('.')}"
+
+        ["#{lower_bound}, #{upper_bound}"]
+      end
+
+      sig { override.returns(T::Array[String]) }
+      def ignored_major_versions
+        version_parts = release_segment # e.g [1,2,3] if version is 1.2.3-alpha3
+        lower_parts = [version_parts[0].to_i + 1] + [lowest_prerelease_suffix] # earliest next major version prerelease
+        lower_bound = ">= #{lower_parts.join('.')}"
+
+        [lower_bound]
+      end
+
       private
 
       sig { params(other: Dependabot::Python::Version).returns(Integer) }
diff --git a/python/spec/dependabot/python/version_spec.rb b/python/spec/dependabot/python/version_spec.rb
index a05d6ec5762..759816a760e 100644
--- a/python/spec/dependabot/python/version_spec.rb
+++ b/python/spec/dependabot/python/version_spec.rb
@@ -77,10 +77,6 @@
   describe ".new" do
     subject(:version) { described_class.new(version_string) }
 
-    before do
-      Dependabot::Experiments.register(:python_new_version, true)
-    end
-
     context "with an empty string" do
       let(:version_string) { "" }
       let(:error_msg) { "Malformed version string - string is empty" }
@@ -342,6 +338,30 @@
     it { is_expected.to eq "dev0" }
   end
 
+  describe "#ignored_major_versions" do
+    subject(:ignored_versions) { version.ignored_major_versions }
+
+    let(:version_string) { "1.2.3-alpha.1" }
+
+    it { is_expected.to eq([">= 2.dev0"]) }
+  end
+
+  describe "#ignored_minor_versions" do
+    subject(:ignored_versions) { version.ignored_minor_versions }
+
+    let(:version_string) { "1.2.3-alpha.1" }
+
+    it { is_expected.to eq([">= 1.3.dev0, < 2.dev0"]) }
+  end
+
+  describe "#ignored_patch_versions" do
+    subject(:ignored_versions) { version.ignored_patch_versions }
+
+    let(:version_string) { "1.2.3-alpha.1" }
+
+    it { is_expected.to eq(["> #{version_string}, < 1.3.dev0"]) }
+  end
+
   describe "compatibility with Gem::Requirement" do
     subject { requirement.satisfied_by?(version) }