diff --git a/CHANGELOG.md b/CHANGELOG.md
index e30837c9..f46f32b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,7 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
- - Fix the `DOWNLOAD_EXTRACT_TIMESTAMP` CMake warning (see [datatype99/issues/15](https://github.com/Hirrolot/datatype99/issues/15)).
+ - Fix the `DOWNLOAD_EXTRACT_TIMESTAMP` CMake warning (see [datatype99/issues/15](https://github.com/hirrolot/datatype99/issues/15)).
 
 ## 0.1.2 - 2022-07-27
 
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d1c0e9b4..da6a11e2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,22 +13,22 @@ include(FetchContent)
 
 FetchContent_Declare(
   slice99
-  GIT_REPOSITORY https://github.com/Hirrolot/slice99
+  GIT_REPOSITORY https://github.com/hirrolot/slice99
   GIT_TAG 7075e1e)
 
 FetchContent_Declare(
   metalang99
-  GIT_REPOSITORY https://github.com/Hirrolot/metalang99
+  GIT_REPOSITORY https://github.com/hirrolot/metalang99
   GIT_TAG e0eb4e1)
 
 FetchContent_Declare(
   datatype99
-  GIT_REPOSITORY https://github.com/Hirrolot/datatype99
+  GIT_REPOSITORY https://github.com/hirrolot/datatype99
   GIT_TAG aa24712)
 
 FetchContent_Declare(
   interface99
-  GIT_REPOSITORY https://github.com/Hirrolot/interface99
+  GIT_REPOSITORY https://github.com/hirrolot/interface99
   GIT_TAG 73c7c1e)
 
 FetchContent_MakeAvailable(slice99 datatype99 interface99)
diff --git a/README.md b/README.md
index dc3e18a0..b0659f43 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ SmolRTSP is a simple [RTSP 1.0] server library tailored for embedded devices, su
  - **Battle-tested.** SmolRTSP is used by [Majestic], an IP camera streamer developed by [OpenIPC].
 
 [libevent]: https://libevent.org/
-[array slices]: https://github.com/Hirrolot/slice99
+[array slices]: https://github.com/hirrolot/slice99
 [Majestic]: https://openipc.github.io/wiki/en/majestic-streamer.html
 [OpenIPC]: https://openipc.org/
 
diff --git a/include/smolrtsp/context.h b/include/smolrtsp/context.h
index 500ae295..03da5266 100644
--- a/include/smolrtsp/context.h
+++ b/include/smolrtsp/context.h
@@ -125,7 +125,7 @@ ssize_t smolrtsp_respond_internal_error(SmolRTSP_Context *ctx);
 /**
  * Implements #SmolRTSP_Droppable_IFACE for #SmolRTSP_Context.
  *
- * See [Interface99](https://github.com/Hirrolot/interface99) for the macro
+ * See [Interface99](https://github.com/hirrolot/interface99) for the macro
  * usage.
  */
 declImplExtern99(SmolRTSP_Droppable, SmolRTSP_Context);
diff --git a/include/smolrtsp/controller.h b/include/smolrtsp/controller.h
index 87b2a1e0..fda67deb 100644
--- a/include/smolrtsp/controller.h
+++ b/include/smolrtsp/controller.h
@@ -107,7 +107,7 @@ typedef enum {
 /**
  * Defines the `SmolRTSP_Controller` interface.
  *
- * See [Interface99](https://github.com/Hirrolot/interface99) for the macro
+ * See [Interface99](https://github.com/hirrolot/interface99) for the macro
  * usage.
  */
 interface99(SmolRTSP_Controller);
diff --git a/include/smolrtsp/droppable.h b/include/smolrtsp/droppable.h
index 849deabb..d5cf3175 100644
--- a/include/smolrtsp/droppable.h
+++ b/include/smolrtsp/droppable.h
@@ -10,7 +10,7 @@
 /**
  * Types that can be dropped (deallocated).
  *
- * See [Interface99](https://github.com/Hirrolot/interface99) for the macro
+ * See [Interface99](https://github.com/hirrolot/interface99) for the macro
  * usage.
  */
 #define SmolRTSP_Droppable_IFACE                                               \
@@ -23,7 +23,7 @@
 /**
  * Defines the `SmolRTSP_Droppable` interface.
  *
- * See [Interface99](https://github.com/Hirrolot/interface99) for the macro
+ * See [Interface99](https://github.com/hirrolot/interface99) for the macro
  * usage.
  */
 interface99(SmolRTSP_Droppable);
diff --git a/include/smolrtsp/nal.h b/include/smolrtsp/nal.h
index 9bd0007b..e204dfd2 100644
--- a/include/smolrtsp/nal.h
+++ b/include/smolrtsp/nal.h
@@ -21,7 +21,7 @@
 /**
  * A generic NAL header (either H.264 or H.265).
  *
- * See [Datatype99](https://github.com/Hirrolot/datatype99) for the macro usage.
+ * See [Datatype99](https://github.com/hirrolot/datatype99) for the macro usage.
  */
 
 // clang-format off
diff --git a/include/smolrtsp/nal_transport.h b/include/smolrtsp/nal_transport.h
index 271dbb2f..05d43ed3 100644
--- a/include/smolrtsp/nal_transport.h
+++ b/include/smolrtsp/nal_transport.h
@@ -112,7 +112,7 @@ int SmolRTSP_NalTransport_send_packet(
 /**
  * Implements #SmolRTSP_Droppable_IFACE for #SmolRTSP_NalTransport.
  *
- * See [Interface99](https://github.com/Hirrolot/interface99) for the macro
+ * See [Interface99](https://github.com/hirrolot/interface99) for the macro
  * usage.
  */
 declImplExtern99(SmolRTSP_Droppable, SmolRTSP_NalTransport);
diff --git a/include/smolrtsp/option.h b/include/smolrtsp/option.h
index 9dc03fc8..a3814323 100644
--- a/include/smolrtsp/option.h
+++ b/include/smolrtsp/option.h
@@ -16,7 +16,7 @@
  *  - `SMOLRTSP_DEF_OPTION(name, T)` expands to `datatype99(name##Option,
  * (name##_Some, T), (name##_None))`.
  *
- * See [Datatype99](https://github.com/Hirrolot/datatype99) for the macro usage.
+ * See [Datatype99](https://github.com/hirrolot/datatype99) for the macro usage.
  */
 #define SMOLRTSP_DEF_OPTION(...)                                               \
     ML99_OVERLOAD(SMOLRTSP_PRIV_DEF_OPTION_, __VA_ARGS__)
diff --git a/include/smolrtsp/rtp_transport.h b/include/smolrtsp/rtp_transport.h
index d6ea481e..618a3d2a 100644
--- a/include/smolrtsp/rtp_transport.h
+++ b/include/smolrtsp/rtp_transport.h
@@ -32,7 +32,7 @@ typedef struct SmolRTSP_RtpTransport SmolRTSP_RtpTransport;
  * clock (e.g., `clock_gettime`). It should be used when a raw timestamp cannot
  * be computed, as typically occurs with real-time video.
  *
- * See [Datatype99](https://github.com/Hirrolot/datatype99) for the macro usage.
+ * See [Datatype99](https://github.com/hirrolot/datatype99) for the macro usage.
  */
 
 // clang-format off
@@ -79,7 +79,7 @@ int SmolRTSP_RtpTransport_send_packet(
 /**
  * Implements #SmolRTSP_Droppable_IFACE for #SmolRTSP_RtpTransport.
  *
- * See [Interface99](https://github.com/Hirrolot/interface99) for the macro
+ * See [Interface99](https://github.com/hirrolot/interface99) for the macro
  * usage.
  */
 declImplExtern99(SmolRTSP_Droppable, SmolRTSP_RtpTransport);
diff --git a/include/smolrtsp/transport.h b/include/smolrtsp/transport.h
index 0c08dd9f..126cef3c 100644
--- a/include/smolrtsp/transport.h
+++ b/include/smolrtsp/transport.h
@@ -16,7 +16,7 @@
 /**
  * A transport-level RTSP data transmitter.
  *
- * See [Interface99](https://github.com/Hirrolot/interface99) for the macro
+ * See [Interface99](https://github.com/hirrolot/interface99) for the macro
  * usage.
  */
 #define SmolRTSP_Transport_IFACE                                               \
@@ -38,7 +38,7 @@
 /**
  * Defines the `SmolRTSP_Transport` interface.
  *
- * See [Interface99](https://github.com/Hirrolot/interface99) for the macro
+ * See [Interface99](https://github.com/hirrolot/interface99) for the macro
  * usage.
  */
 interface99(SmolRTSP_Transport);
diff --git a/include/smolrtsp/types/error.h b/include/smolrtsp/types/error.h
index ebab74cd..fb05253b 100644
--- a/include/smolrtsp/types/error.h
+++ b/include/smolrtsp/types/error.h
@@ -59,7 +59,7 @@ SmolRTSP_ParseType_str(SmolRTSP_ParseType self) SMOLRTSP_PRIV_MUST_USE;
  *  - `MissingCSeq` -- Missing the `CSeq` header.
  *  - `InvalidCSeq` -- Failed to parse the `CSeq` header.
  *
- * See [Datatype99](https://github.com/Hirrolot/datatype99) for the macro usage.
+ * See [Datatype99](https://github.com/hirrolot/datatype99) for the macro usage.
  */
 
 // clang-format off
@@ -96,7 +96,7 @@ int SmolRTSP_ParseError_print(SmolRTSP_ParseError self, SmolRTSP_Writer w)
  *    1. A number of consumed bytes from the beginning of input.
  *  - `Partial` -- Need more data to continue parsing.
  *
- * See [Datatype99](https://github.com/Hirrolot/datatype99) for the macro usage.
+ * See [Datatype99](https://github.com/hirrolot/datatype99) for the macro usage.
  */
 
 // clang-format off
@@ -122,7 +122,7 @@ bool SmolRTSP_ParseStatus_is_partial(SmolRTSP_ParseStatus self)
 /**
  * A result of parsing (either success or failure).
  *
- * See [Datatype99](https://github.com/Hirrolot/datatype99) for the macro usage.
+ * See [Datatype99](https://github.com/hirrolot/datatype99) for the macro usage.
  */
 
 // clang-format off
diff --git a/include/smolrtsp/util.h b/include/smolrtsp/util.h
index 3d54c9a4..a2e8f24f 100644
--- a/include/smolrtsp/util.h
+++ b/include/smolrtsp/util.h
@@ -61,7 +61,7 @@ typedef struct {
 /**
  * Defines `SmolRTSP_PortPairOption`.
  *
- * See [Datatype99](https://github.com/Hirrolot/datatype99) for the macro usage.
+ * See [Datatype99](https://github.com/hirrolot/datatype99) for the macro usage.
  */
 SMOLRTSP_DEF_OPTION(SmolRTSP_PortPair);
 
@@ -83,7 +83,7 @@ typedef struct {
 /**
  * Defines `SmolRTSP_ChannelPairOption`.
  *
- * See [Datatype99](https://github.com/Hirrolot/datatype99) for the macro usage.
+ * See [Datatype99](https://github.com/hirrolot/datatype99) for the macro usage.
  */
 SMOLRTSP_DEF_OPTION(SmolRTSP_ChannelPair);
 
diff --git a/include/smolrtsp/writer.h b/include/smolrtsp/writer.h
index 14f0a31f..6e35a29c 100644
--- a/include/smolrtsp/writer.h
+++ b/include/smolrtsp/writer.h
@@ -62,7 +62,7 @@
 /**
  * Defines the `SmolRTSP_Writer` interface.
  *
- * See [Interface99](https://github.com/Hirrolot/interface99) for the macro
+ * See [Interface99](https://github.com/hirrolot/interface99) for the macro
  * usage.
  */
 interface99(SmolRTSP_Writer);