diff --git a/build.gradle b/build.gradle
index 973e8fd8..3fe85cab 100644
--- a/build.gradle
+++ b/build.gradle
@@ -10,26 +10,26 @@ preprocess {
 	def mc117 = createNode('1.17.1', 1_17_01, 'yarn')
 	def mc118 = createNode('1.18.2', 1_18_02, 'yarn')
 	def mc119 = createNode('1.19.4', 1_19_04, 'yarn')
-	def mc1200 = createNode('1.20', 1_20_00, 'yarn')
+	def mc120 = createNode('1.20', 1_20_00, 'yarn')
 	def mc1201 = createNode('1.20.1', 1_20_01, 'yarn')
 	def mc1202 = createNode('1.20.2', 1_20_02, 'yarn')
 	def mc1203 = createNode('1.20.3', 1_20_03, 'yarn')
 	def mc1204 = createNode('1.20.4', 1_20_04, 'yarn')
 	def mc1205 = createNode('1.20.5', 1_20_05, 'yarn')
 	def mc1206 = createNode('1.20.6', 1_20_06, 'yarn')
-	def mc1210 = createNode('1.21', 1_21_00, 'yarn')
+	def mc121 = createNode('1.21', 1_21_00, 'yarn')
 
 	mc116.link(mc117, file('versions/mapping-1.16-1.17.txt'))
 	mc117.link(mc118, file('versions/mapping-1.17-1.18.txt'))
 	mc118.link(mc119, file('versions/mapping-1.18-1.19.txt'))
-	mc119.link(mc1200, file('versions/mapping-1.19-1.20.txt'))
-	mc1200.link(mc1201, file('versions/mapping-1.20-1.20.1.txt'))
+	mc119.link(mc120, file('versions/mapping-1.19-1.20.txt'))
+	mc120.link(mc1201, file('versions/mapping-1.20-1.20.1.txt'))
 	mc1201.link(mc1202, file('versions/mapping-1.20.1-1.20.2.txt'))
 	mc1202.link(mc1203, file('versions/mapping-1.20.2-1.20.3.txt'))
 	mc1203.link(mc1204, file('versions/mapping-1.20.3-1.20.4.txt'))
 	mc1204.link(mc1205, file('versions/mapping-1.20.4-1.20.5.txt'))
 	mc1205.link(mc1206, file('versions/mapping-1.20.5-1.20.6.txt'))
-	mc1206.link(mc1210, file('versions/mapping-1.20.6-1.21.txt'))
+	mc1206.link(mc121, file('versions/mapping-1.20.6-1.21.txt'))
 }
 
 tasks.register('buildAndGather') {