diff --git a/last_snapshot.txt b/last_snapshot.txt
index e1b9505..1b9e328 100644
--- a/last_snapshot.txt
+++ b/last_snapshot.txt
@@ -1 +1 @@
-23w46a
\ No newline at end of file
+1.20.3-pre1
\ No newline at end of file
diff --git a/mappings/diff/mapping-1.20.2to1.20.3.json b/mappings/diff/mapping-1.20.2to1.20.3.json
new file mode 100644
index 0000000..1b19ece
--- /dev/null
+++ b/mappings/diff/mapping-1.20.2to1.20.3.json
@@ -0,0 +1,8 @@
+{
+  "blockstates": {
+    "grass": ""
+  },
+  "items": {
+    "grass": ""
+  }
+}
\ No newline at end of file
diff --git a/mappings/diff/mapping-1.20.3to1.20.2.json b/mappings/diff/mapping-1.20.3to1.20.2.json
index 38e4da9..1e707f2 100644
--- a/mappings/diff/mapping-1.20.3to1.20.2.json
+++ b/mappings/diff/mapping-1.20.3to1.20.2.json
@@ -147,7 +147,8 @@
     "trial_spawner[trial_spawner_state=active]": "spawner",
     "trial_spawner[trial_spawner_state=waiting_for_reward_ejection]": "spawner",
     "trial_spawner[trial_spawner_state=ejecting_reward]": "spawner",
-    "trial_spawner[trial_spawner_state=cooldown]": "spawner"
+    "trial_spawner[trial_spawner_state=cooldown]": "spawner",
+    "short_grass": ""
   },
   "items": {
     "crafter": "crafting_table",
@@ -206,7 +207,8 @@
     "waxed_oxidized_copper_bulb": "redstone_lamp",
     "breeze_spawn_egg": "shulker_spawn_egg",
     "trial_spawner": "spawner",
-    "trial_key": "tripwire_hook"
+    "trial_key": "tripwire_hook",
+    "short_grass": ""
   },
   "itemnames": {
     "crafter": "1.20.3 Crafter",
diff --git a/mappings/mapping-1.20.3.json b/mappings/mapping-1.20.3.json
index 539e144..abae630 100644
--- a/mappings/mapping-1.20.3.json
+++ b/mappings/mapping-1.20.3.json
@@ -2005,7 +2005,7 @@
     "sticky_piston[extended=false,facing=up]",
     "sticky_piston[extended=false,facing=down]",
     "cobweb",
-    "grass",
+    "short_grass",
     "fern",
     "dead_bush",
     "seagrass",
@@ -26769,7 +26769,7 @@
     "detector_rail",
     "sticky_piston",
     "cobweb",
-    "grass",
+    "short_grass",
     "fern",
     "dead_bush",
     "seagrass",
@@ -27900,7 +27900,7 @@
     "chiseled_sandstone",
     "cut_sandstone",
     "cobweb",
-    "grass",
+    "short_grass",
     "fern",
     "azalea",
     "flowering_azalea",
diff --git a/output/backwards/mappings-1.20.3to1.20.2.nbt b/output/backwards/mappings-1.20.3to1.20.2.nbt
index 9e60ea7..83d7977 100644
Binary files a/output/backwards/mappings-1.20.3to1.20.2.nbt and b/output/backwards/mappings-1.20.3to1.20.2.nbt differ
diff --git a/output/mappings-1.20.2to1.20.3.nbt b/output/mappings-1.20.2to1.20.3.nbt
index 682b709..13ba690 100644
Binary files a/output/mappings-1.20.2to1.20.3.nbt and b/output/mappings-1.20.2to1.20.3.nbt differ