diff --git a/Firely.Fhir.Packages.Tests/ManifestSerializationTest.cs b/Firely.Fhir.Packages.Tests/ManifestSerializationTest.cs
index 5b91852..f14d219 100644
--- a/Firely.Fhir.Packages.Tests/ManifestSerializationTest.cs
+++ b/Firely.Fhir.Packages.Tests/ManifestSerializationTest.cs
@@ -75,7 +75,6 @@ public void TestReadingAComplexAuthorProperty()
         {
             var json = File.ReadAllText($"TestData/unknown-properties-package.json");
             var manifest = PackageParser.ParseManifest(json);
-            //manifest.AuthorInformation()
             manifest.Should().NotBeNull();
         }
 
@@ -86,7 +85,7 @@ public void TestReadingAComplexAuthorProperty()
         [DataTestMethod]
         public void TestAuthorStringParsing(string? fullAuthor, string? name, string? email, string? url)
         {
-            PackageManifest manif = new(name: "authot.test", version: "1.0.1")
+            PackageManifest manif = new(name: "author.test", version: "1.0.1")
             {
                 Author = fullAuthor
             };
@@ -103,7 +102,7 @@ public void TestAuthorStringParsing(string? fullAuthor, string? name, string? em
         [DataTestMethod]
         public void TestAuthorStringSerializing(string? fullAuthor, string? name, string? email, string? url)
         {
-            PackageManifest manif = new(name: "authot.test", version: "1.0.1")
+            PackageManifest manif = new(name: "author.test", version: "1.0.1")
             {
                 AuthorInformation = new()
                 {
diff --git a/Firely.Fhir.Packages.Tests/TestHelper.cs b/Firely.Fhir.Packages.Tests/TestHelper.cs
index 1fc5dc3..ade45a8 100644
--- a/Firely.Fhir.Packages.Tests/TestHelper.cs
+++ b/Firely.Fhir.Packages.Tests/TestHelper.cs
@@ -97,14 +97,7 @@ static IEnumerable<PackageDependency> createDependencies(string[] dependencies)
             {
                 foreach (var dep in dependencies)
                 {
-                    var splitDependency = dep.Split('@');
-                    if (splitDependency.Length == 1)
-                        yield return new PackageDependency(dep, "latest");
-                    else
-                    {
-                        var versionDep = splitDependency[1];
-                        yield return new PackageDependency(splitDependency[0], versionDep);
-                    }
+                    yield return (PackageDependency)dep;
                 }
             }
         }
diff --git a/Firely.Fhir.Packages.Tests/VersionsTest.cs b/Firely.Fhir.Packages.Tests/VersionsTest.cs
index c455e29..22ec238 100644
--- a/Firely.Fhir.Packages.Tests/VersionsTest.cs
+++ b/Firely.Fhir.Packages.Tests/VersionsTest.cs
@@ -1,3 +1,4 @@
+using FluentAssertions;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 
 namespace Firely.Fhir.Packages.Tests
@@ -20,54 +21,60 @@ public void ParseReferences()
             Assert.AreEqual("hl7.fhir.r4.core", reference.Name);
             Assert.AreEqual("4.0.1", reference.Version);
         }
-    }
 
-    [TestClass]
-    public class VersionsTest
-    {
         [TestMethod]
-        public void Resolve_PackageDependencyExistsInVersionList_FixedVersionSearchFindsVersion()
+        public void ParseDependencie()
         {
-            var target = new Versions(new string[] { "1.0.0", "2.0.0" });
+            var dependencie = (PackageDependency)"hl7.fhir.r4.core@4.0.1";
 
-            PackageReference result = target.Resolve(new PackageDependency("SomeName", "1.0.0"));
-
-            Assert.IsTrue(result.Found);
-            Assert.AreEqual("1.0.0", result.Version);
-        }
-
-        [TestMethod]
-        public void Resolve_PackageDependencyExistsInVersionList_RangedVersionSearchFindsVersion()
-        {
-            var target = new Versions(new string[] { "1.0.0", "2.0.0" });
+            Assert.AreEqual("hl7.fhir.r4.core", dependencie.Name);
+            Assert.AreEqual("4.0.1", dependencie.Range);
 
-            PackageReference result = target.Resolve(new PackageDependency("SomeName", "1.x"));
+            dependencie = "hl7.fhir.r4.core@4.0.1";
 
-            Assert.IsTrue(result.Found);
-            Assert.AreEqual("1.0.0", result.Version);
+            Assert.AreEqual("hl7.fhir.r4.core", dependencie.Name);
+            Assert.AreEqual("4.0.1", dependencie.Range);
         }
 
         [TestMethod]
-        public void Resolve_PackageDependencyDoesNotExistInVersionList_FixedVersionSearchReturnsNotFound()
+        public void ParseDependencieWithoutVersion()
         {
-            var target = new Versions(new string[] { "1.0.0", "2.0.0" });
+            var dependencie = (PackageDependency)"hl7.fhir.r4.core";
+
+            Assert.AreEqual("hl7.fhir.r4.core", dependencie.Name);
+            Assert.AreEqual("latest", dependencie.Range);
 
-            PackageReference result = target.Resolve(new PackageDependency("SomeName", "3.0.0"));
+            dependencie = "hl7.fhir.r4.core";
 
-            Assert.IsFalse(result.Found);
-            Assert.IsTrue(result.NotFound);
+            Assert.AreEqual("hl7.fhir.r4.core", dependencie.Name);
+            Assert.AreEqual("latest", dependencie.Range);
         }
+    }
 
-        [TestMethod]
-        public void Resolve_PackageDependencyDoesNotExistInVersionList_RangedVersionSearchReturnsNotFound()
+    [TestClass]
+    public class VersionsTest
+    {
+        [DataRow("1.0.0", "1.0.0")]
+        [DataRow("1.x", "1.0.0")]
+        [DataRow("latest", "2.0.0")]
+        [DataRow(null, "2.0.0")]
+        [DataRow("3.0.0", null)]
+        [DataRow("3.x", null)]
+        [DataTestMethod]
+        public void ResolveVersionTest(string? version, string? versionReturned)
         {
             var target = new Versions(new string[] { "1.0.0", "2.0.0" });
 
-            PackageReference result = target.Resolve(new PackageDependency("SomeName", "3.x"));
+            PackageReference result = target.Resolve(new PackageDependency("SomeName", version));
 
-            Assert.IsFalse(result.Found);
-            Assert.IsTrue(result.NotFound);
-        }
+            bool found = versionReturned is not null;
+            result.Found.Should().Be(found);
+            result.NotFound.Should().NotBe(found);
 
+            if (found)
+            {
+                result.Version.Should().Be(versionReturned);
+            }
+        }
     }
 }
diff --git a/Firely.Fhir.Packages/Models/PackageDependency.cs b/Firely.Fhir.Packages/Models/PackageDependency.cs
index 63f8b18..914f552 100644
--- a/Firely.Fhir.Packages/Models/PackageDependency.cs
+++ b/Firely.Fhir.Packages/Models/PackageDependency.cs
@@ -11,17 +11,17 @@ namespace Firely.Fhir.Packages
     public struct PackageDependency
     {
         public string Name;
-        public string? Range;  // 3.x, 3.1 - 3.3, 1.1 | 1.2
+        public string Range;  // 3.x, 3.1 - 3.3, 1.1 | 1.2
 
         /// <summary>
         /// Initializes a new package dependency
         /// </summary>
         /// <param name="name">name of the package</param>
-        /// <param name="range">the version range for a specific package</param>
+        /// <param name="range">the version range for a specific package, when no version range is specified, the dependency will be on "latest"</param>
         public PackageDependency(string name, string? range = null)
         {
             this.Name = name;
-            this.Range = range;
+            this.Range = range ?? "latest";
         }
 
         /// <summary>
@@ -39,7 +39,14 @@ public static implicit operator PackageDependency(KeyValuePair<string, string?>
         /// <param name="reference">a <see cref="string"/> defining a package name of a new package dependency</param>
         public static implicit operator PackageDependency(string reference)
         {
-            return new PackageDependency(reference, null); // latest
+            var splitDependency = reference.Split('@');
+            if (splitDependency.Length == 1)
+                return new PackageDependency(reference, null);
+            else
+            {
+                var versionDep = splitDependency[1];
+                return new PackageDependency(splitDependency[0], versionDep);
+            }
         }
 
         /// <summary>
@@ -48,8 +55,7 @@ public static implicit operator PackageDependency(string reference)
         /// <returns>A <see cref="string"/> including the package name and the version</returns>
         public override string ToString()
         {
-            string? range = string.IsNullOrEmpty(Range) ? "(latest)" : Range;
-            return $"{Name} {range}";
+            return $"{Name} ({Range})";
         }
     }
 }
diff --git a/Firely.Fhir.Packages/Source/FhirPackageSource.cs b/Firely.Fhir.Packages/Source/FhirPackageSource.cs
index 22619c7..7b6cb9b 100644
--- a/Firely.Fhir.Packages/Source/FhirPackageSource.cs
+++ b/Firely.Fhir.Packages/Source/FhirPackageSource.cs
@@ -90,14 +90,7 @@ static IEnumerable<PackageDependency> createDependencies(string[] dependencies)
             {
                 foreach (var dep in dependencies)
                 {
-                    var splitDependency = dep.Split('@');
-                    if (splitDependency.Length == 1)
-                        yield return new PackageDependency(dep, "latest");
-                    else
-                    {
-                        var versionDep = splitDependency[1];
-                        yield return new PackageDependency(splitDependency[0], versionDep);
-                    }
+                    yield return (PackageDependency)dep;
                 }
             }
         }