diff --git a/.changeset/twelve-seahorses-tap.md b/.changeset/twelve-seahorses-tap.md
new file mode 100644
index 0000000..6d24534
--- /dev/null
+++ b/.changeset/twelve-seahorses-tap.md
@@ -0,0 +1,5 @@
+---
+"rdf-transform-graph-imports": patch
+---
+
+Fix error when resolving HTTPS imports
diff --git a/lib/path.ts b/lib/path.ts
index 7196b70..4d0d0b2 100644
--- a/lib/path.ts
+++ b/lib/path.ts
@@ -6,6 +6,8 @@ interface Options {
   extension?: string
 }
 
+const PROTOCOL_PATTERN = /^https?:/i
+
 export function resolveImport(importNode: Term, { extension }: Options = {}) {
   if (importNode.termType !== 'NamedNode') {
     throw new Error(`Import target must be a NamedNode. Got ${importNode.termType}`)
@@ -13,7 +15,7 @@ export function resolveImport(importNode: Term, { extension }: Options = {}) {
 
   try {
     const targetUri = new URL(importNode.value)
-    if (targetUri.protocol === 'http:') {
+    if (PROTOCOL_PATTERN.test(targetUri.protocol)) {
       return targetUri
     }