diff --git a/pom.xml b/pom.xml
index 34f9281..f3bf5db 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
   <licenses>
     <license>
         <name>GPL-3.0-only</name>
-        <url>https://spdx.org/licenses/GPL-3.0-or-later.html</url>
+        <url>https://spdx.org/licenses/GPL-3.0-only.html</url>
     </license>
   </licenses>
 
diff --git a/src/main/java/io/github/ilri/cgspace/ctasks/CGSpaceCountriesVocabulary.java b/src/main/java/io/github/ilri/cgspace/ctasks/CGSpaceCountriesVocabulary.java
index 517dbd1..213970a 100644
--- a/src/main/java/io/github/ilri/cgspace/ctasks/CGSpaceCountriesVocabulary.java
+++ b/src/main/java/io/github/ilri/cgspace/ctasks/CGSpaceCountriesVocabulary.java
@@ -1,7 +1,7 @@
 /*
  * Copyright (C) 2020 Alan Orth
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: GPL-3.0-only
  */
 
 package io.github.ilri.cgspace.ctasks;
diff --git a/src/main/java/io/github/ilri/cgspace/ctasks/CountriesVocabulary.java b/src/main/java/io/github/ilri/cgspace/ctasks/CountriesVocabulary.java
index e3afe34..ae3e8f4 100644
--- a/src/main/java/io/github/ilri/cgspace/ctasks/CountriesVocabulary.java
+++ b/src/main/java/io/github/ilri/cgspace/ctasks/CountriesVocabulary.java
@@ -1,7 +1,7 @@
 /*
  * Copyright (C) 2020 Alan Orth
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: GPL-3.0-only
  */
 
 package io.github.ilri.cgspace.ctasks;
diff --git a/src/main/java/io/github/ilri/cgspace/ctasks/CountryCodeTagger.java b/src/main/java/io/github/ilri/cgspace/ctasks/CountryCodeTagger.java
index 2e568f2..993f62f 100644
--- a/src/main/java/io/github/ilri/cgspace/ctasks/CountryCodeTagger.java
+++ b/src/main/java/io/github/ilri/cgspace/ctasks/CountryCodeTagger.java
@@ -1,7 +1,7 @@
 /*
  * Copyright (C) 2020 Alan Orth
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: GPL-3.0-only
  */
 
 package io.github.ilri.cgspace.ctasks;
diff --git a/src/main/java/io/github/ilri/cgspace/ctasks/ISO3166CountriesVocabulary.java b/src/main/java/io/github/ilri/cgspace/ctasks/ISO3166CountriesVocabulary.java
index 003b68b..c369fd2 100644
--- a/src/main/java/io/github/ilri/cgspace/ctasks/ISO3166CountriesVocabulary.java
+++ b/src/main/java/io/github/ilri/cgspace/ctasks/ISO3166CountriesVocabulary.java
@@ -1,7 +1,7 @@
 /*
  * Copyright (C) 2020 Alan Orth
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: GPL-3.0-only
  */
 
 package io.github.ilri.cgspace.ctasks;
diff --git a/src/main/java/io/github/ilri/cgspace/scripts/FixJpgJpgThumbnails.java b/src/main/java/io/github/ilri/cgspace/scripts/FixJpgJpgThumbnails.java
index ac579b1..ad5981d 100644
--- a/src/main/java/io/github/ilri/cgspace/scripts/FixJpgJpgThumbnails.java
+++ b/src/main/java/io/github/ilri/cgspace/scripts/FixJpgJpgThumbnails.java
@@ -1,7 +1,7 @@
 /*
  * Copyright (C) 2020 Alan Orth
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: GPL-3.0-only
  */
 
 package io.github.ilri.cgspace.scripts;
diff --git a/src/main/java/io/github/ilri/cgspace/scripts/FixLowQualityThumbnails.java b/src/main/java/io/github/ilri/cgspace/scripts/FixLowQualityThumbnails.java
index ef9a292..8c9f0ac 100644
--- a/src/main/java/io/github/ilri/cgspace/scripts/FixLowQualityThumbnails.java
+++ b/src/main/java/io/github/ilri/cgspace/scripts/FixLowQualityThumbnails.java
@@ -1,7 +1,7 @@
 /*
  * Copyright (C) 2022 Alan Orth
  *
- * SPDX-License-Identifier: GPL-3.0-or-later
+ * SPDX-License-Identifier: GPL-3.0-only
  */
 
 package io.github.ilri.cgspace.scripts;