diff --git a/src/files/chmod.js b/src/files/chmod.js
index b4c0a11dd..3979d4622 100644
--- a/src/files/chmod.js
+++ b/src/files/chmod.js
@@ -10,7 +10,6 @@ module.exports = configure(({ ky }) => {
     const searchParams = new URLSearchParams(options.searchParams)
     searchParams.append('arg', path)
     searchParams.append('mode', modeToString(mode))
-    if (options.format) searchParams.set('format', options.format)
     if (options.flush != null) searchParams.set('flush', options.flush)
     if (options.hashAlg) searchParams.set('hash', options.hashAlg)
     if (options.parents != null) searchParams.set('parents', options.parents)
diff --git a/src/files/cp.js b/src/files/cp.js
index 812c8b7d7..f9ed0bb20 100644
--- a/src/files/cp.js
+++ b/src/files/cp.js
@@ -10,7 +10,6 @@ module.exports = configure(({ ky }) => {
 
     const searchParams = new URLSearchParams(options.searchParams)
     sources.forEach(src => searchParams.append('arg', CID.isCID(src) ? `/ipfs/${src}` : src))
-    if (options.format) searchParams.set('format', options.format)
     if (options.flush != null) searchParams.set('flush', options.flush)
     if (options.hashAlg) searchParams.set('hash', options.hashAlg)
     if (options.parents != null) searchParams.set('parents', options.parents)
diff --git a/src/files/mkdir.js b/src/files/mkdir.js
index 3a50c7728..382c62b22 100644
--- a/src/files/mkdir.js
+++ b/src/files/mkdir.js
@@ -12,7 +12,6 @@ module.exports = configure(({ ky }) => {
     const searchParams = new URLSearchParams(options.searchParams)
     searchParams.append('arg', path)
     if (options.cidVersion != null) searchParams.set('cid-version', options.cidVersion)
-    if (options.format) searchParams.set('format', options.format)
     if (options.flush != null) searchParams.set('flush', options.flush)
     if (options.hashAlg) searchParams.set('hash', options.hashAlg)
     if (options.parents != null) searchParams.set('parents', options.parents)
diff --git a/src/files/mv.js b/src/files/mv.js
index fadf0c34c..78560dfeb 100644
--- a/src/files/mv.js
+++ b/src/files/mv.js
@@ -10,7 +10,6 @@ module.exports = configure(({ ky }) => {
 
     const searchParams = new URLSearchParams(options.searchParams)
     sources.forEach(src => searchParams.append('arg', CID.isCID(src) ? `/ipfs/${src}` : src))
-    if (options.format) searchParams.set('format', options.format)
     if (options.flush != null) searchParams.set('flush', options.flush)
     if (options.hashAlg) searchParams.set('hash', options.hashAlg)
     if (options.parents != null) searchParams.set('parents', options.parents)
diff --git a/src/files/touch.js b/src/files/touch.js
index b38aca905..c4189ecab 100644
--- a/src/files/touch.js
+++ b/src/files/touch.js
@@ -14,7 +14,6 @@ module.exports = configure(({ ky }) => {
       searchParams.set('mtime', mtime.secs)
       searchParams.set('mtimeNsecs', mtime.nsecs)
     }
-    if (options.format) searchParams.set('format', options.format)
     if (options.flush != null) searchParams.set('flush', options.flush)
     if (options.hashAlg) searchParams.set('hash', options.hashAlg)
     if (options.parents != null) searchParams.set('parents', options.parents)