diff --git a/README.md b/README.md
index 8d5ffc4..fd3c032 100644
--- a/README.md
+++ b/README.md
@@ -64,19 +64,16 @@ client.collections.get_stats(collection_name: "example_collection")
 # Creating a new collection schema
 client.collections.create(
   collection_name: "example_collection",
-  description: "Book search",
   auto_id: true,
   fields: [
     {
       fieldName: "book_id",
-      description: "Book ID",
       isPrimary: true,
       autoID: false,
       dataType: "Int64"
     },
     {
       fieldName: "content",
-      description: "Chunk Content",
       dataType: "VarChar",
       elementTypeParams: {
         max_length: "512"
@@ -84,7 +81,6 @@ client.collections.create(
     },
     {
       fieldName: "vector",
-      description: "Chunk Embedding",
       dataType: "FloatVector",
       elementTypeParams: {
         dim: 1536
diff --git a/lib/milvus/collections.rb b/lib/milvus/collections.rb
index 6c4552d..ba5212e 100644
--- a/lib/milvus/collections.rb
+++ b/lib/milvus/collections.rb
@@ -12,7 +12,7 @@ def has(collection_name:)
       response = client.connection.post("#{PATH}/has") do |req|
         req.body = {
           collectionName: collection_name
-        }.to_json
+        }
       end
       response.body
     end
@@ -40,7 +40,7 @@ def get_stats(collection_name:)
       response = client.connection.post("#{PATH}/get_stats") do |req|
         req.body = {
           collectionName: collection_name
-        }.to_json
+        }
       end
       response.body
     end
@@ -55,7 +55,6 @@ def get_stats(collection_name:)
     def create(
       collection_name:,
       auto_id:,
-      description:,
       fields:
     )
       response = client.connection.post("#{PATH}/create") do |req|
@@ -63,11 +62,10 @@ def create(
           collectionName: collection_name,
           schema: {
             autoId: auto_id,
-            description: description,
             fields: fields,
             name: collection_name # This duplicated field is kept for historical reasons.
           }
-        }.to_json
+        }
       end
       response.body.empty? ? true : response.body
     end
@@ -80,7 +78,7 @@ def describe(collection_name:)
       response = client.connection.post("#{PATH}/describe") do |req|
         req.body = {
           collectionName: collection_name
-        }.to_json
+        }
       end
       response.body
     end
@@ -103,7 +101,7 @@ def drop(collection_name:)
       response = client.connection.post("#{PATH}/drop") do |req|
         req.body = {
           collectionName: collection_name
-        }.to_json
+        }
       end
       response.body.empty? ? true : response.body
     end
@@ -142,7 +140,7 @@ def release(collection_name:)
       response = client.connection.post("#{PATH}/release") do |req|
         req.body = {
           collectionName: collection_name
-        }.to_json
+        }
       end
       response.body.empty? ? true : response.body
     end
diff --git a/lib/milvus/entities.rb b/lib/milvus/entities.rb
index 7f7a194..4d4e8b1 100644
--- a/lib/milvus/entities.rb
+++ b/lib/milvus/entities.rb
@@ -21,7 +21,6 @@ def insert(
           collectionName: collection_name,
           data: data
         }
-
         req.body[:partitionName] = partition_name if partition_name
       end
       response.body.empty? ? true : response.body
@@ -40,7 +39,7 @@ def delete(
         req.body = {
           collectionName: collection_name,
           filter: filter
-        }.to_json
+        }
       end
       response.body.empty? ? true : response.body
     end
@@ -84,7 +83,6 @@ def upsert(
           collectionName: collection_name,
           data: data
         }
-
         req.body[:partitionName] = partition_name if partition_name
       end
       response.body.empty? ? true : response.body
diff --git a/lib/milvus/indexes.rb b/lib/milvus/indexes.rb
index 9e117f5..f180a6c 100644
--- a/lib/milvus/indexes.rb
+++ b/lib/milvus/indexes.rb
@@ -17,7 +17,7 @@ def create(
         req.body = {
           collectionName: collection_name,
           indexParams: index_params
-        }.to_json
+        }
       end
       response.body.empty? ? true : response.body
     end
@@ -35,7 +35,7 @@ def drop(
         req.body = {
           collectionName: collection_name,
           indexName: index_name
-        }.to_json
+        }
       end
       response.body.empty? ? true : response.body
     end
@@ -53,7 +53,7 @@ def describe(
         req.body = {
           collectionName: collection_name,
           indexName: index_name
-        }.to_json
+        }
       end
       response.body.empty? ? true : response.body
     end
@@ -68,7 +68,7 @@ def list(
       response = client.connection.post("#{PATH}/list") do |req|
         req.body = {
           collectionName: collection_name
-        }.to_json
+        }
       end
       response.body.empty? ? true : response.body
     end
diff --git a/spec/milvus/collections_spec.rb b/spec/milvus/collections_spec.rb
index 8984e88..6d32ce2 100644
--- a/spec/milvus/collections_spec.rb
+++ b/spec/milvus/collections_spec.rb
@@ -62,14 +62,13 @@
   describe "#create" do
     let(:collection_name) { "test_collection" }
     let(:auto_id) { true }
-    let(:description) { "Test collection" }
     let(:fields) { [{name: "field1", type: "int64"}] }
     let(:response_body) { File.read("spec/fixtures/collections/create.json") }
     let(:response) { instance_double("Faraday::Response", body: response_body) }
 
     it "creates a collection" do
       expect(connection).to receive(:post).with("collections/create").and_return(response)
-      result = collections.create(collection_name: collection_name, auto_id: auto_id, description: description, fields: fields)
+      result = collections.create(collection_name: collection_name, auto_id: auto_id, fields: fields)
       expect(result).to eq(response_body)
     end
   end