4 files changed, 5 insertions, 5 deletions
diff --git a/src/ghdldrv/ghdlprint.adb b/src/ghdldrv/ghdlprint.adb
index ca0722a78..97f54ebde 100644
--- a/src/ghdldrv/ghdlprint.adb
+++ b/src/ghdldrv/ghdlprint.adb
@@ -466,8 +466,8 @@ package body Ghdlprint is
       end case;
       --Put_Line ("<?xml version=""1.0"" encoding=""utf-8"" ?>");
       --Put_Line("<!DOCTYPE html PUBLIC ""-//W3C//DTD XHTML 1.0 Strict//EN""");
-      --Put_Line ("""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"">");
-      --Put_Line ("<html xmlns=""http://www.w3.org/1999/xhtml"""
+      --Put_Line ("""https://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"">");
+      --Put_Line ("<html xmlns=""https://www.w3.org/1999/xhtml"""
       --         & " xml:lang=""en"">");
       --Put_Line ("<head>");
    end Put_Html_Header;
diff --git a/src/grt/fst/lz4.c b/src/grt/fst/lz4.c
index 39f176faf..398e785c1 100644
--- a/src/grt/fst/lz4.c
+++ b/src/grt/fst/lz4.c
@@ -27,7 +27,7 @@
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
    You can contact the author at :
-   - LZ4 source repository : http://code.google.com/p/lz4/
+   - LZ4 source repository : https://github.com/Cyan4973/lz4
    - LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
 */
 
diff --git a/src/grt/fst/lz4.h b/src/grt/fst/lz4.h
index 44ada149e..6e64c99ab 100644
--- a/src/grt/fst/lz4.h
+++ b/src/grt/fst/lz4.h
@@ -28,7 +28,7 @@
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
    You can contact the author at :
-   - LZ4 source repository : http://code.google.com/p/lz4/
+   - LZ4 source repository : https://github.com/Cyan4973/lz4
    - LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
 */
 #pragma once
diff --git a/src/vhdl/iirs.ads b/src/vhdl/iirs.ads
index aaf366f28..7fd10292a 100644
--- a/src/vhdl/iirs.ads
+++ b/src/vhdl/iirs.ads
@@ -25,7 +25,7 @@ package Iirs is
    --  This package defines the semantic tree and functions to handle it.
    --  The tree is roughly based on IIR (Internal Intermediate Representation),
    --  [AIRE/CE Advanced Intermediate Representation with Extensibility,
-   --   Common Environment.  http://www.vhdl.org/aire/index.html ]
+   --   Common Environment.  http://www.vhdl.org/aire/index.html [DEAD LINK] ]
    --  but oriented object features are not used, and sometimes, functions
    --  or fields have changed.