diff --git a/docs/configs.md b/docs/configs.md
index db636c3e1..9caa98aee 100644
--- a/docs/configs.md
+++ b/docs/configs.md
@@ -35,3 +35,39 @@ Valid values for `homepage`: `pages` (default), `posts`, `<collection_name>`,
 jekyll_admin:
   homepage: "posts"
 ```
+
+#### `host`
+
+For overriding `host` from the Jekyll installation.
+
+This can be useful if Jekyll Admin is behind a reverse proxy.
+
+```yaml
+host: "mydomain.com"
+jekyll_admin:
+  host: "admin.mydomain.com"
+```
+
+#### `port`
+
+For overriding `port` from the Jekyll installation.
+
+This can be useful if Jekyll Admin is behind a reverse proxy.
+
+```yaml
+port: 4000
+jekyll_admin:
+  port: 4001
+```
+
+#### `scheme`
+
+For overriding `scheme` from the Jekyll installation.
+
+This can be useful if Jekyll Admin is behind a reverse proxy.
+
+```yaml
+scheme: "https"
+jekyll_admin:
+  scheme: "http"
+```
diff --git a/lib/jekyll-admin/urlable.rb b/lib/jekyll-admin/urlable.rb
index b311dde82..a248f170f 100644
--- a/lib/jekyll-admin/urlable.rb
+++ b/lib/jekyll-admin/urlable.rb
@@ -61,15 +61,19 @@ def path_with_base(base, path)
     end
 
     def scheme
-      JekyllAdmin.site.config["scheme"] || "http"
+      JekyllAdmin.site.config.dig("jekyll_admin", "scheme") ||
+        JekyllAdmin.site.config["scheme"] ||
+        "http"
     end
 
     def host
-      JekyllAdmin.site.config["host"].sub("127.0.0.1", "localhost")
+      JekyllAdmin.site.config.dig("jekyll_admin", "host") ||
+        JekyllAdmin.site.config["host"].sub("127.0.0.1", "localhost")
     end
 
     def port
-      JekyllAdmin.site.config["port"]
+      JekyllAdmin.site.config.dig("jekyll_admin", "port") ||
+        JekyllAdmin.site.config["port"]
     end
   end
 end
diff --git a/spec/jekyll-admin/urlable_spec.rb b/spec/jekyll-admin/urlable_spec.rb
index 83074a68b..e68f41721 100644
--- a/spec/jekyll-admin/urlable_spec.rb
+++ b/spec/jekyll-admin/urlable_spec.rb
@@ -8,16 +8,36 @@
   let(:prefix) { "_api" }
   let(:url_base) { "#{scheme}://#{host}:#{port}" }
 
-  it "knows the host" do
-    expect(subject.send(:host)).to eql("localhost")
-  end
+  context "with custom configuration" do
+    it "knows the jekyll_admin host" do
+      JekyllAdmin.site.config["jekyll_admin"]["host"] = "foo"
+      expect(subject.send(:host)).to eql("foo")
+      JekyllAdmin.site.config["jekyll_admin"]["host"] = nil
+    end
 
-  it "knows the port" do
-    expect(subject.send(:port)).to eql("4000")
-  end
+    it "knows the base host" do
+      expect(subject.send(:host)).to eql("localhost")
+    end
+
+    it "knows the jekyll_admin port" do
+      JekyllAdmin.site.config["jekyll_admin"]["port"] = 1000
+      expect(subject.send(:port)).to eql(1000)
+      JekyllAdmin.site.config["jekyll_admin"]["port"] = nil
+    end
 
-  it "knows the scheme" do
-    expect(subject.send(:scheme)).to eql("http")
+    it "knows the port" do
+      expect(subject.send(:port)).to eql("4000")
+    end
+
+    it "knows the jekyll_admin scheme" do
+      JekyllAdmin.site.config["jekyll_admin"]["scheme"] = "baz"
+      expect(subject.send(:scheme)).to eql("baz")
+      JekyllAdmin.site.config["jekyll_admin"]["scheme"] = nil
+    end
+
+    it "knows the scheme" do
+      expect(subject.send(:scheme)).to eql("http")
+    end
   end
 
   context "pages" do