diff --git a/include/modules/battery.hpp b/include/modules/battery.hpp
index 83f6b73..dc86d51 100644
--- a/include/modules/battery.hpp
+++ b/include/modules/battery.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <json/json.h>
 #include <filesystem>
 #include <fstream>
 #include <gtkmm.h>
@@ -14,7 +15,7 @@ namespace waybar::modules {
 
   class Battery : public IModule {
     public:
-      Battery();
+      Battery(Json::Value config);
       auto update() -> void;
       operator Gtk::Widget&();
     private:
@@ -22,6 +23,7 @@ namespace waybar::modules {
       std::vector<fs::path> _batteries;
       util::SleeperThread _thread;
       Gtk::Label _label;
+      Json::Value _config;
   };
 
 }
diff --git a/include/modules/clock.hpp b/include/modules/clock.hpp
index ec6abed..b20c681 100644
--- a/include/modules/clock.hpp
+++ b/include/modules/clock.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <json/json.h>
 #include <gtkmm.h>
 #include <fmt/format.h>
 #include <thread>
@@ -10,12 +11,13 @@ namespace waybar::modules {
 
   class Clock : public IModule {
     public:
-      Clock();
+      Clock(Json::Value config);
       auto update() -> void;
       operator Gtk::Widget &();
     private:
       Gtk::Label _label;
       waybar::util::SleeperThread _thread;
+      Json::Value _config;
   };
 
 }
diff --git a/include/modules/cpu.hpp b/include/modules/cpu.hpp
index e975ad5..5606764 100644
--- a/include/modules/cpu.hpp
+++ b/include/modules/cpu.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <json/json.h>
 #include <gtkmm.h>
 #include <fmt/format.h>
 #include <sys/sysinfo.h>
@@ -11,12 +12,13 @@ namespace waybar::modules {
 
   class Cpu : public IModule {
     public:
-      Cpu();
+      Cpu(Json::Value config);
       auto update() -> void;
       operator Gtk::Widget &();
     private:
       Gtk::Label _label;
       waybar::util::SleeperThread _thread;
+      Json::Value _config;
   };
 
 }
diff --git a/include/modules/memory.hpp b/include/modules/memory.hpp
index 1c40dac..eb62ebf 100644
--- a/include/modules/memory.hpp
+++ b/include/modules/memory.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <json/json.h>
 #include <gtkmm.h>
 #include <fmt/format.h>
 #include <sys/sysinfo.h>
@@ -11,12 +12,13 @@ namespace waybar::modules {
 
   class Memory : public IModule {
     public:
-      Memory();
+      Memory(Json::Value config);
       auto update() -> void;
       operator Gtk::Widget &();
     private:
       Gtk::Label _label;
       waybar::util::SleeperThread _thread;
+      Json::Value _config;
   };
 
 }
diff --git a/resources/config b/resources/config
index e29c97e..614726a 100644
--- a/resources/config
+++ b/resources/config
@@ -1,4 +1,13 @@
 {
     "modules-left": ["workspaces"],
-    "modules-right": ["cpu", "memory", "battery", "clock"]
+    "modules-right": ["cpu", "memory", "battery", "clock"],
+    "cpu": {
+        "format": "{}% "
+    },
+    "memory": {
+        "format": "{}% "
+    },
+    "battery": {
+        "format": "{}% "
+    }
 }
diff --git a/src/factory.cpp b/src/factory.cpp
index a181a6e..2955332 100644
--- a/src/factory.cpp
+++ b/src/factory.cpp
@@ -7,14 +7,14 @@ waybar::Factory::Factory(Bar &bar, Json::Value config)
 waybar::IModule &waybar::Factory::makeModule(std::string name)
 {
   if (name == "battery")
-    return *new waybar::modules::Battery();
+    return *new waybar::modules::Battery(_config[name]);
   if (name == "workspaces")
     return *new waybar::modules::Workspaces(_bar);
   if (name == "memory")
-    return *new waybar::modules::Memory();
+    return *new waybar::modules::Memory(_config[name]);
   if (name == "cpu")
-    return *new waybar::modules::Cpu();
+    return *new waybar::modules::Cpu(_config[name]);
   if (name == "clock")
-    return *new waybar::modules::Clock();
+    return *new waybar::modules::Clock(_config[name]);
   throw std::runtime_error("Unknown module: " + name);
 }
diff --git a/src/modules/battery.cpp b/src/modules/battery.cpp
index a66718b..2836f54 100644
--- a/src/modules/battery.cpp
+++ b/src/modules/battery.cpp
@@ -1,6 +1,7 @@
 #include "modules/battery.hpp"
 
-waybar::modules::Battery::Battery()
+waybar::modules::Battery::Battery(Json::Value config)
+  : _config(config)
 {
   try {
     for (auto &node : fs::directory_iterator(_data_dir)) {
@@ -41,7 +42,8 @@ auto waybar::modules::Battery::update() -> void
     } else {
       _label.get_style_context()->remove_class("charging");
     }
-    _label.set_text(fmt::format("{}% ", total / _batteries.size()));
+    auto format = _config["format"] ? _config["format"].asString() : "{}%";
+    _label.set_text(fmt::format(format, total / _batteries.size()));
   } catch (std::exception &e) {
     std::cerr << e.what() << std::endl;
   }
diff --git a/src/modules/clock.cpp b/src/modules/clock.cpp
index c652e84..c84dc94 100644
--- a/src/modules/clock.cpp
+++ b/src/modules/clock.cpp
@@ -1,6 +1,7 @@
 #include "modules/clock.hpp"
 
-waybar::modules::Clock::Clock()
+waybar::modules::Clock::Clock(Json::Value config)
+  : _config(config)
 {
   _label.get_style_context()->add_class("clock");
   _thread = [this] {
@@ -16,8 +17,9 @@ auto waybar::modules::Clock::update() -> void
 {
   auto t = std::time(nullptr);
   auto localtime = std::localtime(&t);
-  _label.set_text(
-      fmt::format("{:02}:{:02}", localtime->tm_hour, localtime->tm_min));
+  auto format =
+    _config["format"] ? _config["format"].asString() : "{:02}:{:02}";
+  _label.set_text(fmt::format(format, localtime->tm_hour, localtime->tm_min));
 }
 
 waybar::modules::Clock::operator Gtk::Widget &() {
diff --git a/src/modules/cpu.cpp b/src/modules/cpu.cpp
index cde3128..20e117b 100644
--- a/src/modules/cpu.cpp
+++ b/src/modules/cpu.cpp
@@ -1,7 +1,8 @@
 #include "modules/cpu.hpp"
 #include <iostream>
 
-waybar::modules::Cpu::Cpu()
+waybar::modules::Cpu::Cpu(Json::Value config)
+  : _config(config)
 {
   _label.get_style_context()->add_class("cpu");
   _thread = [this] {
@@ -15,8 +16,9 @@ auto waybar::modules::Cpu::update() -> void
   struct sysinfo info;
   if (!sysinfo(&info)) {
     float f_load = 1.f / (1 << SI_LOAD_SHIFT);
-    _label.set_text(fmt::format("{:.{}f}% ",
-      info.loads[0] * f_load * 100 / get_nprocs(), 0));
+    int load = info.loads[0] * f_load * 100 / get_nprocs();
+    auto format = _config["format"] ? _config["format"].asString() : "{}%";
+    _label.set_text(fmt::format(format, load));
   }
 }
 
diff --git a/src/modules/memory.cpp b/src/modules/memory.cpp
index 104c973..bb981f4 100644
--- a/src/modules/memory.cpp
+++ b/src/modules/memory.cpp
@@ -1,7 +1,8 @@
 #include "modules/memory.hpp"
 #include <iostream>
 
-waybar::modules::Memory::Memory()
+waybar::modules::Memory::Memory(Json::Value config)
+  : _config(config)
 {
   _label.get_style_context()->add_class("memory");
   _thread = [this] {
@@ -14,8 +15,9 @@ auto waybar::modules::Memory::update() -> void
 {
   struct sysinfo info;
   if (!sysinfo(&info)) {
-    double available = (double)info.freeram / (double)info.totalram;
-    _label.set_text(fmt::format("{:.{}f}% ", available * 100, 0));
+    int available = ((double)info.freeram / (double)info.totalram) * 100;
+    auto format = _config["format"] ? _config["format"].asString() : "{}%";
+    _label.set_text(fmt::format(format, available));
   }
 }