diff --git a/mustache-sharp/EqTagDefinition.cs b/mustache-sharp/EqTagDefinition.cs
index cf60516..8086266 100644
--- a/mustache-sharp/EqTagDefinition.cs
+++ b/mustache-sharp/EqTagDefinition.cs
@@ -58,7 +58,7 @@ namespace Mustache {
             }
 
          
-            if ((condition is double || condition is int) && (targetValue is double || targetValue is int) ) {
+            if ((condition is double || condition is int) || (targetValue is double || targetValue is int) ) {
                 return Convert.ToDouble(condition) == Convert.ToDouble(targetValue);
             }
 
diff --git a/mustache-sharp/GtTagDefinition.cs b/mustache-sharp/GtTagDefinition.cs
index 1c54107..25980a9 100644
--- a/mustache-sharp/GtTagDefinition.cs
+++ b/mustache-sharp/GtTagDefinition.cs
@@ -55,12 +55,12 @@ namespace Mustache {
                 return false;
             }
 
-            if ((condition is double || condition is int) && (targetValue is double || targetValue is int)) {
+            try {
                 return Convert.ToDouble(condition) > Convert.ToDouble(targetValue);
+            } catch (Exception exception) {
+                return false;
             }
 
-
-            return false;
         }
 
         /// <summary>
diff --git a/mustache-sharp/GteTagDefinition.cs b/mustache-sharp/GteTagDefinition.cs
index c63b7d9..eb407ec 100644
--- a/mustache-sharp/GteTagDefinition.cs
+++ b/mustache-sharp/GteTagDefinition.cs
@@ -55,11 +55,14 @@ namespace Mustache {
                 return false;
             }
 
-            if ((condition is double || condition is int) && (targetValue is double || targetValue is int)) {
+            try {
                 return Convert.ToDouble(condition) >= Convert.ToDouble(targetValue);
+            } catch (Exception exception) {
+                return false;
             }
 
 
+
             return false;
         }
 
diff --git a/mustache-sharp/LtTagDefinition.cs b/mustache-sharp/LtTagDefinition.cs
index 7d38a17..8a70479 100644
--- a/mustache-sharp/LtTagDefinition.cs
+++ b/mustache-sharp/LtTagDefinition.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Linq.Expressions;
 using System.Text;
 
 namespace Mustache {
@@ -55,12 +56,14 @@ namespace Mustache {
                 return false;
             }
 
-            if ((condition is double || condition is int) && (targetValue is double || targetValue is int)) {
+            try {
                 return Convert.ToDouble(condition) < Convert.ToDouble(targetValue);
             }
+            catch (Exception exception) {
+                return false;
+            }
 
 
-            return false;
         }
 
         /// <summary>
diff --git a/mustache-sharp/LteTagDefinition.cs b/mustache-sharp/LteTagDefinition.cs
index 505659b..32c9183 100644
--- a/mustache-sharp/LteTagDefinition.cs
+++ b/mustache-sharp/LteTagDefinition.cs
@@ -55,10 +55,12 @@ namespace Mustache {
                 return false;
             }
 
-            if ((condition is double || condition is int) && (targetValue is double || targetValue is int)) {
+            try {
                 return Convert.ToDouble(condition) <= Convert.ToDouble(targetValue);
+            } catch (Exception exception) {
+                return false;
             }
-            
+
             return false;
         }