diff --git a/.changeset/fair-bees-smoke.md b/.changeset/fair-bees-smoke.md
new file mode 100644
index 0000000..d46f7be
--- /dev/null
+++ b/.changeset/fair-bees-smoke.md
@@ -0,0 +1,5 @@
+---
+'@tokens-studio/sd-transforms': patch
+---
+
+Add hairline and ultra to fontWeightsMap, reflect to 1 and 1000 respectively.
diff --git a/src/transformFontWeights.ts b/src/transformFontWeights.ts
index f3c76dc..7410f14 100644
--- a/src/transformFontWeights.ts
+++ b/src/transformFontWeights.ts
@@ -1,4 +1,5 @@
 export const fontWeightMap = {
+  hairline: 1,
   thin: 100,
   extralight: 200,
   ultralight: 200,
@@ -23,6 +24,7 @@ export const fontWeightMap = {
   heavy: 900,
   super: 900,
   extrafett: 900,
+  ultra: 1000,
 };
 
 export const fontWeightReg = /(?<weight>.+?)\s?(?<style>italic|oblique|normal)?$/i;