diff --git a/src/actions/create_bucket.rs b/src/actions/create_bucket.rs
index 9c28527..554e2ad 100644
--- a/src/actions/create_bucket.rs
+++ b/src/actions/create_bucket.rs
@@ -50,7 +50,7 @@ impl<'a> S3Action<'a> for CreateBucket<'a> {
 
         sign(
             time,
-            Method::Put,
+            Self::METHOD,
             url,
             self.credentials.key(),
             self.credentials.secret(),
diff --git a/src/actions/delete_bucket.rs b/src/actions/delete_bucket.rs
index 7fa1b9a..4103ba0 100644
--- a/src/actions/delete_bucket.rs
+++ b/src/actions/delete_bucket.rs
@@ -52,7 +52,7 @@ impl<'a> S3Action<'a> for DeleteBucket<'a> {
 
         sign(
             time,
-            Method::Delete,
+            Self::METHOD,
             url,
             self.credentials.key(),
             self.credentials.secret(),
diff --git a/src/actions/delete_object.rs b/src/actions/delete_object.rs
index 702cf85..b05b9dc 100644
--- a/src/actions/delete_object.rs
+++ b/src/actions/delete_object.rs
@@ -54,7 +54,7 @@ impl<'a> S3Action<'a> for DeleteObject<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Delete,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/delete_objects.rs b/src/actions/delete_objects.rs
index 5ac666d..c84cef9 100644
--- a/src/actions/delete_objects.rs
+++ b/src/actions/delete_objects.rs
@@ -135,7 +135,7 @@ where
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Post,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/get_object.rs b/src/actions/get_object.rs
index 47f6afd..feb8d16 100644
--- a/src/actions/get_object.rs
+++ b/src/actions/get_object.rs
@@ -54,7 +54,7 @@ impl<'a> S3Action<'a> for GetObject<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Get,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/head_bucket.rs b/src/actions/head_bucket.rs
index e954969..a023421 100644
--- a/src/actions/head_bucket.rs
+++ b/src/actions/head_bucket.rs
@@ -52,7 +52,7 @@ impl<'a> S3Action<'a> for HeadBucket<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Head,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/head_object.rs b/src/actions/head_object.rs
index 53dce4a..1cb6a42 100644
--- a/src/actions/head_object.rs
+++ b/src/actions/head_object.rs
@@ -54,7 +54,7 @@ impl<'a> S3Action<'a> for HeadObject<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Head,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/list_objects_v2.rs b/src/actions/list_objects_v2.rs
index af2d32b..f327d4d 100644
--- a/src/actions/list_objects_v2.rs
+++ b/src/actions/list_objects_v2.rs
@@ -208,7 +208,7 @@ impl<'a> S3Action<'a> for ListObjectsV2<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Get,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/multipart_upload/abort.rs b/src/actions/multipart_upload/abort.rs
index 6d7dedd..88b4bd8 100644
--- a/src/actions/multipart_upload/abort.rs
+++ b/src/actions/multipart_upload/abort.rs
@@ -68,7 +68,7 @@ impl<'a> S3Action<'a> for AbortMultipartUpload<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Delete,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/multipart_upload/complete.rs b/src/actions/multipart_upload/complete.rs
index 67712d8..bc7847f 100644
--- a/src/actions/multipart_upload/complete.rs
+++ b/src/actions/multipart_upload/complete.rs
@@ -111,7 +111,7 @@ where
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Post,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/multipart_upload/create.rs b/src/actions/multipart_upload/create.rs
index 880888e..ab895b2 100644
--- a/src/actions/multipart_upload/create.rs
+++ b/src/actions/multipart_upload/create.rs
@@ -83,7 +83,7 @@ impl<'a> S3Action<'a> for CreateMultipartUpload<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Post,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/multipart_upload/list_parts.rs b/src/actions/multipart_upload/list_parts.rs
index c372afe..56d3977 100644
--- a/src/actions/multipart_upload/list_parts.rs
+++ b/src/actions/multipart_upload/list_parts.rs
@@ -112,7 +112,7 @@ impl<'a> S3Action<'a> for ListParts<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Get,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/multipart_upload/upload.rs b/src/actions/multipart_upload/upload.rs
index 173d761..7299e50 100644
--- a/src/actions/multipart_upload/upload.rs
+++ b/src/actions/multipart_upload/upload.rs
@@ -85,7 +85,7 @@ impl<'a> S3Action<'a> for UploadPart<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Put,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),
diff --git a/src/actions/put_object.rs b/src/actions/put_object.rs
index 723f289..1436e23 100644
--- a/src/actions/put_object.rs
+++ b/src/actions/put_object.rs
@@ -54,7 +54,7 @@ impl<'a> S3Action<'a> for PutObject<'a> {
         match self.credentials {
             Some(credentials) => sign(
                 time,
-                Method::Put,
+                Self::METHOD,
                 url,
                 credentials.key(),
                 credentials.secret(),