diff --git a/config.c b/config.c
new file mode 100644
index 0000000..35086f3
--- /dev/null
+++ b/config.c
@@ -0,0 +1,104 @@
+#include "config.h"
+#include "util.h"
+#include <errno.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void parsing_error(size_t line) {
+    fprintf(stderr, "error: failed parsing config at line %zu", line);
+    exit(EXIT_FAILURE);
+}
+
+Config parse_config(FILE *config_file) {
+    size_t len = 0;
+    ssize_t read;
+    char *line = NULL;
+    size_t line_index = 0;
+    bool in_config = false; 
+
+    char current_path[MAX_MODULE_NAME_LENGTH];
+    Module current_module = {
+        .path = NULL,
+        .config = NULL,
+    };
+    size_t config_index = 0;
+    size_t config_multiplier = 1;
+    
+    Config config = {
+        .modules = malloc(MAX_MODULES * sizeof(Module)),
+        .module_count = 0,
+    };
+
+    // TODO handle errors of all the function inside the while
+    errno = 0;
+
+    // TODO rewrite this to read the config char by char
+    while ((read = getline(&line, &len, config_file)) != -1) {
+        if (read <= 1)
+            continue;
+
+        // if config is passed to this module
+        if (line[read - 2u] == '{') {
+            if (in_config) {
+                fclose(config_file);
+                parsing_error(line_index);
+            }
+            in_config = true;
+            // get rid of the '{'
+            strncpy(current_path, line, (size_t)read - 2);
+            current_path[read - 2] = '\0';
+
+            current_module.path = process_str(current_path);
+            current_module.config = malloc(INITIAL_CONFIG_SIZE * sizeof(char*));
+            continue;
+        }
+
+        // end of config for current module
+        if (line[read - 2u] == '}') {
+            if (!in_config) {
+                fclose(config_file);
+                parsing_error(line_index);
+            }
+            in_config = false;
+
+            if (config_index >= INITIAL_CONFIG_SIZE * config_multiplier) {
+                config_multiplier *= 2;
+                current_module.config = realloc(current_module.config, INITIAL_CONFIG_SIZE * config_multiplier);
+            }
+            current_module.config[config_index] = NULL;
+            config.modules[config.module_count] = current_module;
+            config.module_count += 1;
+            config_index = 0;
+            continue;
+        }
+
+        if (in_config) {
+            if (config_index >= INITIAL_CONFIG_SIZE * config_multiplier) {
+                config_multiplier *= 2;
+                current_module.config = realloc(current_module.config, INITIAL_CONFIG_SIZE * config_multiplier);
+            }
+            current_module.config[config_index] = process_str(line);
+            config_index += 1;
+            continue;
+        }
+
+        // no config passed to this module
+        current_module.path = process_str(line);
+
+        current_module.config = malloc(sizeof(void*));
+        current_module.config[0] = NULL;
+
+        config.modules[config.module_count] = current_module;
+        config.module_count += 1;
+
+        free(line);
+    }
+    if (read == -1 && errno != 0)
+        free(line);
+
+    return config;
+}
+
diff --git a/config.h b/config.h
new file mode 100644
index 0000000..1e50a34
--- /dev/null
+++ b/config.h
@@ -0,0 +1,24 @@
+#ifndef _MODFETCH_CONFIG_H
+#define _MODFETCH_CONFIG_H
+
+#include <stddef.h>
+#include <stdio.h>
+
+typedef struct {
+    // path to the binary of this module
+    char *path;
+    // name=value strings for each value in config
+    char **config;
+} Module;
+
+typedef struct {
+    size_t module_count;
+    Module *modules;
+} Config;
+
+
+void parsing_error(size_t line);
+
+Config parse_config(FILE *config_file);
+
+#endif // _MODFETCH_CONFIG_H
diff --git a/modfetch.c b/modfetch.c
index 497b3bf..c280054 100644
--- a/modfetch.c
+++ b/modfetch.c
@@ -1,5 +1,8 @@
+#include "config.h"
 #include "mod.h"
 #include "semver.h"
+#include "util.h"
+
 #include <ctype.h>
 #include <dlfcn.h>
 #include <errno.h>
@@ -19,195 +22,6 @@ static const semver VERSION = {
     .patch = 0,
 };
 
-static const uint8_t MAX_MODULE_NAME_LENGTH = 128;
-static const uint8_t MAX_MODULES = 128;
-
-static const uint8_t INITIAL_CONFIG_SIZE = 8;
-
-static const uint16_t MAX_PATH_LENGTH = 4096;
-
-typedef struct {
-    // path to the binary of this module
-    char *path;
-    // name=value strings for each value in config
-    char **config;
-} Module;
-
-typedef struct {
-    size_t module_count;
-    Module *modules;
-} Config;
-
-void parsing_error(size_t line) {
-    fprintf(stderr, "error: failed parsing config at line %zu", line);
-    exit(EXIT_FAILURE);
-}
-
-char *remove_whitespaces(const char *str) {
-    char tmp[strlen(str)];
-    size_t i = 0;
-    size_t j = 0;
-    while (str[i] != '\0') {
-        if (isspace(str[i])) {
-            i += 1;
-            continue;
-        }
-        tmp[j] = str[i];
-        i += 1;
-        j += 1;
-    }
-
-    char *ret = malloc(j * sizeof(char));
-    strncpy(ret, tmp, j);
-    ret[j] = '\0';
-
-    return ret;
-}
-
-char *resolve_env_vars(const char *str) {
-    size_t len = strlen(str);
-    char *ret = malloc(MAX_PATH_LENGTH * sizeof(char));
-    size_t ret_offset = 0;
-    bool in_env_var = false;
-    char env_var[MAX_PATH_LENGTH];
-    memset(env_var, 0, sizeof(env_var));
-    size_t env_var_offset = 0;
-
-    for (size_t i = 0; i < len; ++i) {
-        if (str[i] == '~') {
-            char *home = getenv("HOME");
-            strcat(ret, home);
-            ret_offset += strlen(home);
-            continue;
-        }
-        
-        if (str[i] == '$') {
-            in_env_var = true;
-            continue;
-        }
-
-        // end of current env var
-        if (in_env_var && !(isalpha(str[i]) || isdigit(str[i]) || str[i] == '_')) {
-            in_env_var = false;
-
-            char *env = getenv(env_var);
-            strcat(ret, env);
-            ret_offset += strlen(env);
-            memset(env_var, 0, sizeof(env_var));
-            env_var_offset = 0;
-        }
-
-        if (in_env_var) {
-            env_var[env_var_offset] = str[i];
-            env_var_offset += 1;
-            continue;
-        }
-
-        ret[ret_offset] = str[i];
-        ret_offset += 1;
-    }
-    ret[ret_offset] = '\0';
-
-    return ret;
-}
-
-char *process_str(const char *str) {
-    char *whitespaceless = remove_whitespaces(str);
-    char *ret = resolve_env_vars(whitespaceless);
-    free(whitespaceless);
-    return ret;
-}
-
-Config parse_config(FILE *config_file) {
-    size_t len = 0;
-    ssize_t read;
-    char *line = NULL;
-    size_t line_index = 0;
-    bool in_config = false; 
-
-    char current_path[MAX_MODULE_NAME_LENGTH];
-    Module current_module = {
-        .path = NULL,
-        .config = NULL,
-    };
-    size_t config_index = 0;
-    size_t config_multiplier = 1;
-    
-    Config config = {
-        .modules = malloc(MAX_MODULES * sizeof(Module)),
-        .module_count = 0,
-    };
-
-    // TODO handle errors of all the function inside the while
-    errno = 0;
-
-    // TODO rewrite this to read the config char by char
-    while ((read = getline(&line, &len, config_file)) != -1) {
-        if (read <= 1)
-            continue;
-
-        // if config is passed to this module
-        if (line[read - 2u] == '{') {
-            if (in_config) {
-                fclose(config_file);
-                parsing_error(line_index);
-            }
-            in_config = true;
-            // get rid of the '{'
-            strncpy(current_path, line, (size_t)read - 2);
-            current_path[read - 2] = '\0';
-
-            current_module.path = process_str(current_path);
-            current_module.config = malloc(INITIAL_CONFIG_SIZE * sizeof(char*));
-            continue;
-        }
-
-        // end of config for current module
-        if (line[read - 2u] == '}') {
-            if (!in_config) {
-                fclose(config_file);
-                parsing_error(line_index);
-            }
-            in_config = false;
-
-            if (config_index >= INITIAL_CONFIG_SIZE * config_multiplier) {
-                config_multiplier *= 2;
-                current_module.config = realloc(current_module.config, INITIAL_CONFIG_SIZE * config_multiplier);
-            }
-            current_module.config[config_index] = NULL;
-            config.modules[config.module_count] = current_module;
-            config.module_count += 1;
-            config_index = 0;
-            continue;
-        }
-
-        if (in_config) {
-            if (config_index >= INITIAL_CONFIG_SIZE * config_multiplier) {
-                config_multiplier *= 2;
-                current_module.config = realloc(current_module.config, INITIAL_CONFIG_SIZE * config_multiplier);
-            }
-            current_module.config[config_index] = process_str(line);
-            config_index += 1;
-            continue;
-        }
-
-        // no config passed to this module
-        current_module.path = process_str(line);
-
-        current_module.config = malloc(sizeof(void*));
-        current_module.config[0] = NULL;
-
-        config.modules[config.module_count] = current_module;
-        config.module_count += 1;
-
-        free(line);
-    }
-    if (read == -1 && errno != 0)
-        free(line);
-
-    return config;
-}
-
 int main(int argc, char *argv[]) {
 
     char *config_path;
diff --git a/util.c b/util.c
new file mode 100644
index 0000000..2ff20b6
--- /dev/null
+++ b/util.c
@@ -0,0 +1,80 @@
+#include "util.h"
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+char *remove_whitespaces(const char *str) {
+    char tmp[strlen(str)];
+    size_t i = 0;
+    size_t j = 0;
+    while (str[i] != '\0') {
+        if (isspace(str[i])) {
+            i += 1;
+            continue;
+        }
+        tmp[j] = str[i];
+        i += 1;
+        j += 1;
+    }
+
+    char *ret = malloc(j * sizeof(char));
+    strncpy(ret, tmp, j);
+    ret[j] = '\0';
+
+    return ret;
+}
+
+char *resolve_env_vars(const char *str) {
+    size_t len = strlen(str);
+    char *ret = malloc(MAX_PATH_LENGTH * sizeof(char));
+    size_t ret_offset = 0;
+    bool in_env_var = false;
+    char env_var[MAX_PATH_LENGTH];
+    memset(env_var, 0, sizeof(env_var));
+    size_t env_var_offset = 0;
+
+    for (size_t i = 0; i < len; ++i) {
+        if (str[i] == '~') {
+            char *home = getenv("HOME");
+            strcat(ret, home);
+            ret_offset += strlen(home);
+            continue;
+        }
+        
+        if (str[i] == '$') {
+            in_env_var = true;
+            continue;
+        }
+
+        // end of current env var
+        if (in_env_var && !(isalpha(str[i]) || isdigit(str[i]) || str[i] == '_')) {
+            in_env_var = false;
+
+            char *env = getenv(env_var);
+            strcat(ret, env);
+            ret_offset += strlen(env);
+            memset(env_var, 0, sizeof(env_var));
+            env_var_offset = 0;
+        }
+
+        if (in_env_var) {
+            env_var[env_var_offset] = str[i];
+            env_var_offset += 1;
+            continue;
+        }
+
+        ret[ret_offset] = str[i];
+        ret_offset += 1;
+    }
+    ret[ret_offset] = '\0';
+
+    return ret;
+}
+
+char *process_str(const char *str) {
+    char *whitespaceless = remove_whitespaces(str);
+    char *ret = resolve_env_vars(whitespaceless);
+    free(whitespaceless);
+    return ret;
+}
diff --git a/util.h b/util.h
new file mode 100644
index 0000000..63b3e34
--- /dev/null
+++ b/util.h
@@ -0,0 +1,20 @@
+#ifndef _MODFETCH_UTIL_H
+#define _MODFETCH_UTIL_H
+
+#include <stdint.h>
+
+static const uint8_t MAX_MODULE_NAME_LENGTH = 128;
+static const uint8_t MAX_MODULES = 128;
+
+static const uint8_t INITIAL_CONFIG_SIZE = 8;
+
+static const uint16_t MAX_PATH_LENGTH = 4096;
+
+
+char *remove_whitespaces(const char *str);
+
+char *resolve_env_vars(const char *str);
+
+char *process_str(const char *str);
+
+#endif // _MODFETCH_UTIL_H