diff --git a/invokeai/frontend/src/features/parameters/components/AdvancedParameters/ImageToImage/ImageToImageStrength.tsx b/invokeai/frontend/src/features/parameters/components/AdvancedParameters/ImageToImage/ImageToImageStrength.tsx
index 4ad3847115..33ed4fff07 100644
--- a/invokeai/frontend/src/features/parameters/components/AdvancedParameters/ImageToImage/ImageToImageStrength.tsx
+++ b/invokeai/frontend/src/features/parameters/components/AdvancedParameters/ImageToImage/ImageToImageStrength.tsx
@@ -29,7 +29,7 @@ export default function ImageToImageStrength(props: ImageToImageStrengthProps) {
       label={label}
       step={0.01}
       min={0.01}
-      max={0.99}
+      max={1}
       onChange={handleChangeStrength}
       value={img2imgStrength}
       isInteger={false}
diff --git a/ldm/generate.py b/ldm/generate.py
index fa4e603499..ca05478823 100644
--- a/ldm/generate.py
+++ b/ldm/generate.py
@@ -425,7 +425,7 @@ class Generate:
         assert cfg_scale > 1.0, 'CFG_Scale (-C) must be >1.0'
         assert threshold >= 0.0, '--threshold must be >=0.0'
         assert (
-            0.0 < strength < 1.0
+            0.0 < strength <= 1.0
         ), 'img2img and inpaint strength can only work with 0.0 < strength < 1.0'
         assert (
             0.0 <= variation_amount <= 1.0