diff --git a/package-lock.json b/package-lock.json
index a8f5752a..598bd97f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2134,6 +2134,13 @@
         "ignore": "^5.1.4",
         "merge2": "^1.3.0",
         "slash": "^3.0.0"
+      },
+      "dependencies": {
+        "slash": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
+          "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q=="
+        }
       }
     },
     "got": {
@@ -4797,7 +4804,7 @@
       }
     },
     "rehype-img-size": {
-      "version": "git+https://github.com/unicorn-utterances/rehype-img-size.git#4080a1807ebf6711427b380fc73493b51bab6ca1",
+      "version": "git+https://github.com/unicorn-utterances/rehype-img-size.git#9b89df92310514d7cc13f1a3614f557870d0e708",
       "from": "git+https://github.com/unicorn-utterances/rehype-img-size.git#relative-path-full",
       "requires": {
         "image-size": "^1.0.0",
@@ -5295,9 +5302,9 @@
       "integrity": "sha512-sDl4qMFpijcGw22U5w63KmD3cZJfBuFlVNbVMKje2keoKML7X2UzWbc4XrmEbDwg0NXJc3yv4/ox7b+JWb57kQ=="
     },
     "slash": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
-      "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q=="
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/slash/-/slash-4.0.0.tgz",
+      "integrity": "sha512-3dOsAHXXUkQTpOYcoAxLIorMTp4gIQr5IW3iVb7A7lFIp0VHhnynm9izx6TssdrIcVIESAlVjtnO2K8bg+Coew=="
     },
     "smart-buffer": {
       "version": "4.2.0",
diff --git a/package.json b/package.json
index 661264c7..150aace6 100644
--- a/package.json
+++ b/package.json
@@ -33,6 +33,7 @@
     "remark-stringify": "^10.0.1",
     "remark-unwrap-images": "^3.0.1",
     "retext-english": "^4.1.0",
+    "slash": "^4.0.0",
     "ts-util-helpers": "^1.0.0-alpha.3",
     "typescript": "^4.4.4",
     "unified": "^10.1.0",
diff --git a/src/utils/url-paths.ts b/src/utils/url-paths.ts
index ff5fabe1..4d8fe11b 100644
--- a/src/utils/url-paths.ts
+++ b/src/utils/url-paths.ts
@@ -1,4 +1,6 @@
 import urljoin from "url-join";
+import {join} from "path";
+import slash from "slash";
 
 /**
  * Matches:
@@ -11,17 +13,11 @@ export const absolutePathRegex = /^(?:[a-z]+:)?\/\//;
 export const isRelativePath = (str: string) => {
     const isAbsolute = absolutePathRegex.exec(str);
     if (isAbsolute) return false;
-    // Matches simple `test.png` links
-    const simpleRelativePath = /^\w/.exec(str);
-    return str.startsWith('./') || str.startsWith('/') || (
-        simpleRelativePath
-    )
+    return true;
 }
 
 export const getFullRelativePath = (slug: string, srcStr: string) => {
-    if (srcStr.startsWith('./')) srcStr = srcStr.slice(2);
-    return isRelativePath(srcStr) && !srcStr.startsWith('/') ?
-        // URLJoin doesn't seem to handle the `./` well
-        urljoin('/posts', slug, srcStr)
+    return isRelativePath(srcStr) ?
+        slash(join('/posts', slug, srcStr))
         : srcStr
 }