diff --git a/docs/customization.md b/docs/customization.md
index c7e35f4..fa035ca 100644
--- a/docs/customization.md
+++ b/docs/customization.md
@@ -16,13 +16,19 @@ This file should contain a JSON object that can have the following optional
 keys:
 
 - **`"styles"`**\
-  A path to a single custom style sheet, or an array of multiple style sheets
-  applied in order. These will be applied after Vivify's [default
-  styles](./static/) are applied so that there are always sensible fallbacks but
-  you can override everything.
+  A path to a single custom style sheet, or an array of paths for multiple style
+  sheets applied in order. The paths can be absolute, start with a tilde (`~`)
+  for your home directory, or be relative to your config file's directory. The
+  paths can also include [glob patterns](https://www.npmjs.com/package/glob).\
+  The styles will be applied after Vivify's [default styles](../static/) are
+  applied so that there are always sensible fallbacks but you can override
+  everything.
 - **`"scripts"`**\
   A path to a single custom JavaScript to inject into the viewing pages, or an
-  array of multiple custom scripts.
+  array of paths for multiple custom scripts injected in order. The paths can be
+  absolute, start with a tilde (`~`) for your home directory, or be relative to
+  your config file's directory. The paths can also include [glob
+  patterns](https://www.npmjs.com/package/glob).
 - **`"dirListIgnore"`**\
   A path to a file with globs to ignore in Vivify's directory viewer, or an
   array of multiple paths to ignore files. The syntax here is the same as in
diff --git a/src/config.ts b/src/config.ts
index 7bebd8e..bbf5c80 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -1,4 +1,5 @@
 import fs from 'fs';
+import { globSync } from 'glob';
 import { homedir } from 'os';
 import path from 'path';
 
@@ -45,11 +46,23 @@ const configPaths = [
 ];
 
 // read contents of file at paths or files at paths
-const getFileContents = (paths: string[] | string | undefined): string => {
+const getFileContents = (
+    paths: string[] | string | undefined,
+    baseDir: string | undefined,
+): string => {
     if (paths === undefined) return '';
+
     const getFileContent = (p: string): string => {
-        const resolved = p[0] === '~' ? path.join(homedir(), p.slice(1)) : p;
-        return fs.existsSync(resolved) ? fs.readFileSync(resolved, 'utf8') : '';
+        let resolved = p;
+        if (resolved[0] === '~') {
+            resolved = path.join(homedir(), p.slice(1));
+        }
+        if (resolved[0] !== '/' && baseDir !== undefined) {
+            resolved = path.join(baseDir, resolved);
+        }
+        return globSync(resolved)
+            .map((p) => fs.readFileSync(p, 'utf8'))
+            .join('\n');
     };
 
     if (Array.isArray(paths)) {
@@ -60,11 +73,13 @@ const getFileContents = (paths: string[] | string | undefined): string => {
 
 const config = ((): Config => {
     let config = undefined;
+    let configBaseDir = undefined;
     // greedily find config
     for (const cp of configPaths) {
         if (!fs.existsSync(cp)) continue;
         try {
             config = JSON.parse(fs.readFileSync(cp, 'utf8'));
+            configBaseDir = path.dirname(cp);
         } catch {}
         break;
     }
@@ -77,9 +92,9 @@ const config = ((): Config => {
     }
 
     // get styles, scripts and ignore files
-    config.styles = getFileContents(config.styles);
-    config.scripts = getFileContents(config.scripts);
-    config.dirListIgnore = getFileContents(config.dirListIgnore)
+    config.styles = getFileContents(config.styles, configBaseDir);
+    config.scripts = getFileContents(config.scripts, configBaseDir);
+    config.dirListIgnore = getFileContents(config.dirListIgnore, configBaseDir)
         .split('\n')
         .filter((pattern) => pattern !== '' && pattern[0] !== '#');