diff --git a/makefile b/makefile
index 94d4ed8..a66fb14 100644
--- a/makefile
+++ b/makefile
@@ -1,6 +1,6 @@
 # C compiler
 CC=gcc # alternatives: tcc, clang, zig cc 
-WARNINGS=-Wall
+WARNINGS=-Wall -Wextra -Wpedantic -Wshadow -Wformat=2 -Wno-unused-parameter
 OPTIMIZED_SOME=-O3 
 OPTIMIZED_MORE=-Ofast -march=native -funit-at-a-time -flto # binary will not be compatible with other computers, but may be much faster
 DEBUG=-g
diff --git a/plugins/libre_redirect/libre_redirect.c b/plugins/libre_redirect/libre_redirect.c
index 08f836a..c9d6ff6 100644
--- a/plugins/libre_redirect/libre_redirect.c
+++ b/plugins/libre_redirect/libre_redirect.c
@@ -66,8 +66,9 @@ int libre_redirect(const char* uri, char* output)
                     fprintf(stderr, "Unreachable state\n");
             }
         }
-        // Use snprintf instead of strcpy for safety
-        snprintf(output, len_output, "%s", uri);
+        // Use strncpy with explicit null termination for safety
+        strncpy(output, uri, len_output - 1);
+        output[len_output - 1] = '\0';
     }
 
     int utm_check = str_destructively_omit_from(output, "?utm");
diff --git a/plugins/readability/readability.c b/plugins/readability/readability.c
index 13670ce..674fbd7 100644
--- a/plugins/readability/readability.c
+++ b/plugins/readability/readability.c
@@ -1,3 +1,4 @@
+#include <glib.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -5,27 +6,29 @@
 
 void read_readability_js(char* string)
 {
-    FILE* fp = fopen("/opt/rosenrot/readability.js", "r");
-    if (!fp) { // fp is NULL, fopen failed
-        fprintf(stderr, "Failed to open file\n");
+    gchar* file_contents = NULL;
+    gsize length = 0;
+    GError* error = NULL;
+
+    if (!g_file_get_contents("/opt/rosenrot/readability.js", &file_contents, &length, &error)) {
+        fprintf(stderr, "Failed to open file: %s\n", error ? error->message : "unknown error");
         fprintf(stderr, "Consider running $ sudo make runtime_files\n");
-        string = NULL;
+        if (error) g_error_free(error);
+        string[0] = '\0';
         return;
     }
-    int i = 0;
-    int c;
-    while ((c = fgetc(fp)) != EOF) {
-        if (i >= READABILITY_N) {
-            fprintf(stderr, "readability.js file is too large (exceeds %d bytes)\n", READABILITY_N);
-            fprintf(stderr, "Consider increasing READABILITY_N or running recompute_READABILITY_N.sh\n");
-            fclose(fp);
-            string[0] = '\0';
-            return;
-        }
-        string[i++] = c;
+
+    if (length > READABILITY_N) {
+        fprintf(stderr, "readability.js file is too large (%zu bytes, max %d)\n", length, READABILITY_N);
+        fprintf(stderr, "Consider increasing READABILITY_N or running recompute_READABILITY_N.sh\n");
+        g_free(file_contents);
+        string[0] = '\0';
+        return;
     }
-    string[i] = '\0';
-    fclose(fp);
+
+    memcpy(string, file_contents, length);
+    string[length] = '\0';
+    g_free(file_contents);
 }
 
 /*
diff --git a/plugins/shortcuts/shortcuts.c b/plugins/shortcuts/shortcuts.c
index ec7acbd..4afc58f 100644
--- a/plugins/shortcuts/shortcuts.c
+++ b/plugins/shortcuts/shortcuts.c
@@ -62,8 +62,9 @@ int shortcut_expand(const char* uri, char* output)
                     fprintf(stderr, "Unreachable state\n");
             }
         }
-        // Use snprintf instead of strcpy for safety
-        snprintf(output, len_output, "%s", uri);
+        // Use strncpy with explicit null termination for safety
+        strncpy(output, uri, len_output - 1);
+        output[len_output - 1] = '\0';
     }
     if (DEBUG) printf("No match found\n\n");
     return 0;
diff --git a/plugins/strings/strings.c b/plugins/strings/strings.c
index 632463b..c16a67a 100644
--- a/plugins/strings/strings.c
+++ b/plugins/strings/strings.c
@@ -49,8 +49,9 @@ int str_replace_start(const char* string, const char* target, const char* replac
         return 2; // success
     } else {
         if (DEBUG) printf("Did not find match.\n");
-        // Use snprintf instead of strcpy for safety
-        snprintf(output, l4, "%s", string);
+        // Use strncpy with explicit null termination for safety
+        strncpy(output, string, l4 - 1);
+        output[l4 - 1] = '\0';
     }
 
     return 0;
diff --git a/plugins/style/style.c b/plugins/style/style.c
index 1ac7b3f..aabf2a3 100644
--- a/plugins/style/style.c
+++ b/plugins/style/style.c
@@ -1,3 +1,4 @@
+#include <glib.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -5,24 +6,26 @@
 
 void read_style_js(char* string)
 {
-    FILE* fp = fopen("/opt/rosenrot/style.js", "r");
-    if (!fp) { // fp is NULL, fopen failed
-        fprintf(stderr, "Failed to open file\n");
-        string = NULL;
+    gchar* file_contents = NULL;
+    gsize length = 0;
+    GError* error = NULL;
+
+    if (!g_file_get_contents("/opt/rosenrot/style.js", &file_contents, &length, &error)) {
+        fprintf(stderr, "Failed to open file: %s\n", error ? error->message : "unknown error");
+        if (error) g_error_free(error);
+        string[0] = '\0';
         return;
     }
-    int i = 0;
-    int c;
-    while ((c = fgetc(fp)) != EOF) {
-        if (i >= STYLE_N) {
-            fprintf(stderr, "style.js file is too large (exceeds %d bytes)\n", STYLE_N);
-            fprintf(stderr, "Consider increasing STYLE_N or running recompute_STYLE_N.sh\n");
-            fclose(fp);
-            string[0] = '\0';
-            return;
-        }
-        string[i++] = c;
+
+    if (length > STYLE_N) {
+        fprintf(stderr, "style.js file is too large (%zu bytes, max %d)\n", length, STYLE_N);
+        fprintf(stderr, "Consider increasing STYLE_N or running recompute_STYLE_N.sh\n");
+        g_free(file_contents);
+        string[0] = '\0';
+        return;
     }
-    string[i] = '\0';
-    fclose(fp);
+
+    memcpy(string, file_contents, length);
+    string[length] = '\0';
+    g_free(file_contents);
 }