diff --git a/npm_and_yarn/lib/dependabot/npm_and_yarn/file_fetcher.rb b/npm_and_yarn/lib/dependabot/npm_and_yarn/file_fetcher.rb
index 1f154039d6..f0d8a69c10 100644
--- a/npm_and_yarn/lib/dependabot/npm_and_yarn/file_fetcher.rb
+++ b/npm_and_yarn/lib/dependabot/npm_and_yarn/file_fetcher.rb
@@ -184,7 +184,13 @@ def guess_yarn_version
       def pnpm_version
         return @pnpm_version if defined?(@pnpm_version)
 
-        @pnpm_version = package_manager.requested_version("pnpm") || guess_pnpm_version
+        version = package_manager.requested_version("pnpm") || guess_pnpm_version
+
+        if version && Version.new(version.to_s) < Version.new("7")
+          raise ToolVersionNotSupported.new("PNPM", version.to_s, "7.*, 8.*")
+        end
+
+        @pnpm_version = version
       end
 
       def guess_pnpm_version
diff --git a/npm_and_yarn/spec/dependabot/npm_and_yarn/file_fetcher_spec.rb b/npm_and_yarn/spec/dependabot/npm_and_yarn/file_fetcher_spec.rb
index d6fd047997..9eb46a965d 100644
--- a/npm_and_yarn/spec/dependabot/npm_and_yarn/file_fetcher_spec.rb
+++ b/npm_and_yarn/spec/dependabot/npm_and_yarn/file_fetcher_spec.rb
@@ -344,10 +344,9 @@
           .to match_array(%w(package.json pnpm-lock.yaml))
       end
 
-      it "parses the version as 6" do
-        expect(file_fetcher_instance.ecosystem_versions).to eq(
-          { package_managers: { "pnpm" => 6 } }
-        )
+      it "raises tool version not supported error" do
+        expect { file_fetcher_instance.ecosystem_versions }
+          .to raise_error(Dependabot::ToolVersionNotSupported)
       end
     end