diff --git a/.github/workflows_json/release.json b/.github/workflows/release.json
similarity index 100%
rename from .github/workflows_json/release.json
rename to .github/workflows/release.json
diff --git a/.github/workflows_json/test.json b/.github/workflows/test.json
similarity index 96%
rename from .github/workflows_json/test.json
rename to .github/workflows/test.json
index d8fb271..bb23b94 100644
--- a/.github/workflows_json/test.json
+++ b/.github/workflows/test.json
@@ -2,8 +2,8 @@
     "name": "test",
     "on": {
         "push": {
-            "branches": [
-                "dev"
+            "branches-ignore": [
+                "master"
             ],
             "paths-ignore": [
                 ".git*",
@@ -13,8 +13,7 @@
         },
         "pull_request": {
             "branches": [
-                "master",
-                "dev"
+                "master"
             ],
             "paths-ignore": [
                 ".git*",
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index a7dd708..de841c1 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -1,8 +1,8 @@
 name: test
 on:
     push:
-        branches:
-            - dev
+        branches-ignore:
+            - master
         paths-ignore:
             - .git*
             - '**.md'
@@ -10,7 +10,6 @@ on:
     pull_request:
         branches:
             - master
-            - dev
         paths-ignore:
             - .git*
             - '**.md'
diff --git a/.github/workflows/to_yaml.sh b/.github/workflows/to_yaml.sh
new file mode 100644
index 0000000..cea5c29
--- /dev/null
+++ b/.github/workflows/to_yaml.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+set -eu
+
+cd ${0%/*}
+
+for _v in $(find ./ -maxdepth 1 -type f -name '*.json'); do
+    yq -I 4 -o y ${_v} | head -c -1 > ${_v%.*}.yaml
+done; unset _v
\ No newline at end of file
diff --git a/.github/workflows_json/to_yaml.sh b/.github/workflows_json/to_yaml.sh
deleted file mode 100644
index 4878624..0000000
--- a/.github/workflows_json/to_yaml.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/bin/sh
-set -eu
-
-cd ${0%/*}
-
-yq -o y -I 4 ./${1}.json | head -c -1 > ../workflows/${1}.yaml
\ No newline at end of file
diff --git a/README.md b/README.md
index 2e658c3..dee291c 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 # **Arduino Percent**
 ![actions:test](https://github.com/dojyorin/arduino_percent/actions/workflows/test.yaml/badge.svg)
 ![actions:release](https://github.com/dojyorin/arduino_percent/actions/workflows/release.yaml/badge.svg)
+![shields:license](https://img.shields.io/github/license/dojyorin/arduino_percent)
+![shields:release](https://img.shields.io/github/release/dojyorin/arduino_percent)
 
 Convert between URL-unsafe string and percent encoded string.
 Easily convert to percent encoded string.
diff --git a/library.properties b/library.properties
index 768cc78..b4ad74b 100644
--- a/library.properties
+++ b/library.properties
@@ -1,6 +1,6 @@
 name=percent_encode
 author=dojyorin
-version=2.0.1
+version=2.0.2
 architectures=*
 includes=arduino_percent.hpp
 sentence=Convert between URL-unsafe string and percent encoded string.
diff --git a/src/percent.cpp b/src/percent.cpp
index d329925..234c737 100644
--- a/src/percent.cpp
+++ b/src/percent.cpp
@@ -1,8 +1,8 @@
 #include "./arduino_percent.hpp"
 
 namespace{
-    constexpr char symbols[] = "0123456789ABCDEF";
-    constexpr char unreserved[] = "-._~0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+    constexpr char CODE[] = "0123456789ABCDEF";
+    constexpr char UNRESERVED[] = "-._~0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
 
     uint8_t indexOf(char search){
         if('`' < search){
@@ -10,7 +10,7 @@ namespace{
         }
 
         for(uint8_t i = 0; i < 16; i++){
-            if(symbols[i] == search){
+            if(::CODE[i] == search){
                 return i;
             }
         }
@@ -19,7 +19,7 @@ namespace{
     }
 
     bool isUnreserved(char search){
-        for(const auto &v: unreserved){
+        for(const auto &v: ::UNRESERVED){
             if(v == search){
                 return true;
             }
@@ -31,13 +31,13 @@ namespace{
 
 void percent::encode(const char* input, char* output){
     while(*input != '\0'){
-        if(isUnreserved(*input)){
+        if(::isUnreserved(*input)){
             *output++ = *input;
         }
         else{
             *output++ = '%';
-            *output++ = symbols[*input >> 0x04];
-            *output++ = symbols[*input & 0x0F];
+            *output++ = ::CODE[*input >> 0x04];
+            *output++ = ::CODE[*input & 0x0F];
         }
 
         input++;
@@ -50,7 +50,7 @@ size_t percent::encodeLength(const char* input){
     size_t length = 0;
 
     while(*input != '\0'){
-        length += isUnreserved(*input++) ? 1 : 3;
+        length += ::isUnreserved(*input++) ? 1 : 3;
     }
 
     return length + 1;
@@ -59,7 +59,7 @@ size_t percent::encodeLength(const char* input){
 void percent::decode(const char* input, char* output){
     while(*input != '\0'){
         if(*input == '%'){
-            *output++ = (indexOf(*++input) << 4) + indexOf(*++input);
+            *output++ = (::indexOf(*++input) << 4) + ::indexOf(*++input);
         }
         else{
             *output++ = *input;