diff --git a/Readme.markdown b/Readme.markdown
index e4a28b8..a020a63 100644
--- a/Readme.markdown
+++ b/Readme.markdown
@@ -21,7 +21,7 @@ Core features:
 * Output format: Raw modules/pixels of the QR symbol
 * Detects finder-like penalty patterns more accurately than other implementations
 * Encodes numeric and special-alphanumeric text in less space than general text
-* Open source code under the permissive MIT License
+* Open-source code under the permissive MIT License
 
 Manual parameters:
 
diff --git a/java/src/main/java/io/nayuki/qrcodegen/package-info.java b/java/src/main/java/io/nayuki/qrcodegen/package-info.java
index 04ff2cd..461d1ea 100644
--- a/java/src/main/java/io/nayuki/qrcodegen/package-info.java
+++ b/java/src/main/java/io/nayuki/qrcodegen/package-info.java
@@ -12,7 +12,7 @@
  *   <li><p>Supports encoding all 40 versions (sizes) and all 4 error correction levels, as per the QR Code Model 2 standard</p></li>
  *   <li><p>Output format: Raw modules/pixels of the QR symbol</p></li>
  *   <li><p>Encodes numeric and special-alphanumeric text in less space than general text</p></li>
- *   <li><p>Open source code under the permissive MIT License</p></li>
+ *   <li><p>Open-source code under the permissive MIT License</p></li>
  * </ul>
  * <p>Manual parameters:</p>
  * <ul>
diff --git a/python/setup.py b/python/setup.py
index 7e4b4d4..ffc9043 100644
--- a/python/setup.py
+++ b/python/setup.py
@@ -71,7 +71,7 @@ Core features:
 * Supports encoding all 40 versions (sizes) and all 4 error correction levels, as per the QR Code Model 2 standard
 * Output format: Raw modules/pixels of the QR symbol
 * Encodes numeric and special-alphanumeric text in less space than general text
-* Open source code under the permissive MIT License
+* Open-source code under the permissive MIT License
 
 Manual parameters:
 
diff --git a/rust/Readme.markdown b/rust/Readme.markdown
index f14a66d..d7d6702 100644
--- a/rust/Readme.markdown
+++ b/rust/Readme.markdown
@@ -21,7 +21,7 @@ Core features:
 * Output format: Raw modules/pixels of the QR symbol
 * Detects finder-like penalty patterns more accurately than other implementations
 * Encodes numeric and special-alphanumeric text in less space than general text
-* Open source code under the permissive MIT License
+* Open-source code under the permissive MIT License
 
 Manual parameters:
 
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
index eded602..4b7715a 100644
--- a/rust/src/lib.rs
+++ b/rust/src/lib.rs
@@ -41,7 +41,7 @@
 //! - Output format: Raw modules/pixels of the QR symbol
 //! - Detects finder-like penalty patterns more accurately than other implementations
 //! - Encodes numeric and special-alphanumeric text in less space than general text
-//! - Open source code under the permissive MIT License
+//! - Open-source code under the permissive MIT License
 //! 
 //! Manual parameters:
 //!