diff --git a/mineleader.lua b/mineleader.lua
index 07eb40c..52c0550 100644
--- a/mineleader.lua
+++ b/mineleader.lua
@@ -406,6 +406,9 @@ end
 	
 
 local function quarry(x, y, z, forward, right, pattern)
+	x = tonumber(x)
+	y = tonumber(y)
+	z = tonumber(z)
 	sendLog(QUARRY, "Starting quarry of (x length,depth,z length): " .. x .. "," .. y .. "," .. z)
 	for yDelta=1,math.abs(y) do
 		for xDelta=1,math.abs(x) do