diff --git a/src/GitVersion.Core/VersionCalculation/SemanticVersioning/SemanticVersion.cs b/src/GitVersion.Core/VersionCalculation/SemanticVersioning/SemanticVersion.cs
index 3975a634f8..7bd2bf9463 100644
--- a/src/GitVersion.Core/VersionCalculation/SemanticVersioning/SemanticVersion.cs
+++ b/src/GitVersion.Core/VersionCalculation/SemanticVersioning/SemanticVersion.cs
@@ -147,10 +147,10 @@ public static SemanticVersion Parse(string version, string tagPrefixRegex)
         public static bool TryParse(string version, string tagPrefixRegex, out SemanticVersion semanticVersion)
         {
             var match = Regex.Match(version, $"^({tagPrefixRegex})?(?<version>.*)$");
+            semanticVersion = null;
 
             if (!match.Success)
             {
-                semanticVersion = null;
                 return false;
             }
 
@@ -159,7 +159,6 @@ public static bool TryParse(string version, string tagPrefixRegex, out SemanticV
 
             if (!parsed.Success)
             {
-                semanticVersion = null;
                 return false;
             }
 
@@ -167,15 +166,32 @@ public static bool TryParse(string version, string tagPrefixRegex, out SemanticV
             var fourthPart = parsed.Groups["FourthPart"];
             if (fourthPart.Success && semanticVersionBuildMetaData.CommitsSinceTag == null)
             {
-                semanticVersionBuildMetaData.CommitsSinceTag = int.Parse(fourthPart.Value);
+                semanticVersionBuildMetaData.CommitsSinceTag = Int32.Parse(fourthPart.Value);
+            }
+
+            int major = 0, minor = 0, patch = 0;
+
+            if (!parsed.Groups["Major"].Success || !Int32.TryParse(parsed.Groups["Major"].Value, out major))
+            {
+                return false;
+            }
+
+            if (parsed.Groups["Minor"].Success && !Int32.TryParse(parsed.Groups["Minor"].Value, out minor))
+            {
+                return false;
+            }
+
+            if (parsed.Groups["Patch"].Success && !Int32.TryParse(parsed.Groups["Patch"].Value, out patch))
+            {
+                return false;
             }
 
             semanticVersion = new SemanticVersion
             {
-                Major = int.Parse(parsed.Groups["Major"].Value),
-                Minor = parsed.Groups["Minor"].Success ? int.Parse(parsed.Groups["Minor"].Value) : 0,
-                Patch = parsed.Groups["Patch"].Success ? int.Parse(parsed.Groups["Patch"].Value) : 0,
-                PreReleaseTag = SemanticVersionPreReleaseTag.Parse(parsed.Groups["Tag"].Value),
+                Major = major,
+                Minor = minor,
+                Patch = patch,
+                PreReleaseTag = SemanticVersionPreReleaseTag.TryParse(parsed.Groups["Tag"].Value),
                 BuildMetaData = semanticVersionBuildMetaData
             };
 
diff --git a/src/GitVersion.Core/VersionCalculation/SemanticVersioning/SemanticVersionPreReleaseTag.cs b/src/GitVersion.Core/VersionCalculation/SemanticVersioning/SemanticVersionPreReleaseTag.cs
index 9bfd838b38..8b5b7b5941 100644
--- a/src/GitVersion.Core/VersionCalculation/SemanticVersioning/SemanticVersionPreReleaseTag.cs
+++ b/src/GitVersion.Core/VersionCalculation/SemanticVersioning/SemanticVersionPreReleaseTag.cs
@@ -84,10 +84,10 @@ public static implicit operator string(SemanticVersionPreReleaseTag preReleaseTa
 
         public static implicit operator SemanticVersionPreReleaseTag(string preReleaseTag)
         {
-            return Parse(preReleaseTag);
+            return TryParse(preReleaseTag);
         }
 
-        public static SemanticVersionPreReleaseTag Parse(string preReleaseTag)
+        public static SemanticVersionPreReleaseTag TryParse(string preReleaseTag)
         {
             if (string.IsNullOrEmpty(preReleaseTag))
             {
@@ -103,7 +103,8 @@ public static SemanticVersionPreReleaseTag Parse(string preReleaseTag)
             }
 
             var value = match.Groups["name"].Value;
-            var number = match.Groups["number"].Success ? int.Parse(match.Groups["number"].Value) : (int?)null;
+            var number = (match.Groups["number"].Success && int.TryParse(match.Groups["number"].Value, out int parsedNumber)) ? (int?)parsedNumber : null;
+
             if (value.EndsWith("-"))
                 return new SemanticVersionPreReleaseTag(preReleaseTag, null);