diff --git a/API.Tests/Parser/ParserTest.cs b/API.Tests/Parser/ParserTest.cs
index 2f46c6bb2..314c7cd11 100644
--- a/API.Tests/Parser/ParserTest.cs
+++ b/API.Tests/Parser/ParserTest.cs
@@ -121,6 +121,8 @@ namespace API.Tests.Parser
         [InlineData("18-04", 4)]
         [InlineData("18-04.5", 4.5)]
         [InlineData("40", 40)]
+        [InlineData("40a-040b", 0)]
+        [InlineData("40.1_a", 0)]
         public void MinimumNumberFromRangeTest(string input, float expected)
         {
             Assert.Equal(expected, MinimumNumberFromRange(input));
diff --git a/API/Parser/Parser.cs b/API/Parser/Parser.cs
index 024f11640..45b8940e7 100644
--- a/API/Parser/Parser.cs
+++ b/API/Parser/Parser.cs
@@ -799,6 +799,10 @@ namespace API.Parser
         
         public static float MinimumNumberFromRange(string range)
         {
+            if (!Regex.IsMatch(range, @"^[\d-.]+$"))
+            {
+                return (float) 0.0;
+            }
             var tokens = range.Replace("_", string.Empty).Split("-");
             return tokens.Min(float.Parse);
         }