diff --git a/src/Parser.cs b/src/Parser.cs
index 3a4497a..02a8c60 100644
--- a/src/Parser.cs
+++ b/src/Parser.cs
@@ -490,7 +490,7 @@ namespace WorldOfPeacecraft
 			{
 				try {
 					return Values [name];
-				} catch (ArgumentOutOfRangeException e) {
+				} catch (KeyNotFoundException e) {
 					throw new ParsingException("The parameter '" + name + "' does not exist in block '" + Name + "'", e);
 				}
 			}
@@ -499,7 +499,7 @@ namespace WorldOfPeacecraft
 			{
 				try {
 					return int.Parse (Values [name]);
-				} catch (ArgumentOutOfRangeException e) {
+				} catch (KeyNotFoundException e) {
 					throw new ParsingException("The parameter '" + name + "' does not exist in block '" + Name + "'", e);
 				} catch (FormatException e) {
 					throw new ParsingException("The parameter '" + name + "' in block '" + Name + "' is not an integer (it was '" + Values [name] + "')", e);
@@ -512,7 +512,7 @@ namespace WorldOfPeacecraft
 			{
 				try {
 					return long.Parse (Values [name]);
-				} catch (ArgumentOutOfRangeException e) {
+				} catch (KeyNotFoundException e) {
 					throw new ParsingException("The parameter '" + name + "' does not exist in block '" + Name + "'", e);
 				} catch (FormatException e) {
 					throw new ParsingException("The parameter '" + name + "' in block '" + Name + "' is not a long (it was '" + Values [name] + "')", e);
@@ -525,7 +525,7 @@ namespace WorldOfPeacecraft
 			{
 				try {
 					return bool.Parse (Values [name]);
-				} catch (ArgumentOutOfRangeException e) {
+				} catch (KeyNotFoundException e) {
 					throw new ParsingException ("The parameter '" + name + "' does not exist in block '" + Name + "'", e);
 				} catch (FormatException e) {
 					throw new ParsingException ("The parameter '" + name + "' in block '" + Name + "' is not a bool (it was '" + Values [name] + "')", e);