1 files changed, 2 insertions, 0 deletions
diff --git a/src/main/java/io/github/moulberry/notenoughupdates/util/Calculator.java b/src/main/java/io/github/moulberry/notenoughupdates/util/Calculator.java
index 7d378a03..10bfa6a9 100644
--- a/src/main/java/io/github/moulberry/notenoughupdates/util/Calculator.java
+++ b/src/main/java/io/github/moulberry/notenoughupdates/util/Calculator.java
@@ -25,10 +25,12 @@ import java.util.ArrayDeque;
 import java.util.ArrayList;
 import java.util.Deque;
 import java.util.List;
+import java.util.Locale;
 import java.util.NoSuchElementException;
 
 public class Calculator {
 	public static BigDecimal calculate(String source) throws CalculatorException {
+		source = source.toLowerCase(Locale.ROOT);
 		return evaluate(shuntingYard(lex(source)));
 	}