diff --git a/docs/install.adoc b/docs/install.adoc
index a454d663f..804cdd411 100644
--- a/docs/install.adoc
+++ b/docs/install.adoc
@@ -7,7 +7,7 @@ image::https://www.veripool.org/img/verilator_256_200_min.png[Logo,256,200,role=
 == Introduction
 
 This discusses how to install Verilator.  For more general information
-please see http://verilator.org[verilator.org].
+please see https://verilator.org[verilator.org].
 
 == Quick-start
 
@@ -34,7 +34,7 @@ brief:
 #sudo apt-get install libfl2  # Ubuntu only (ignore if gives error)
 #sudo apt-get install libfl-dev  # Ubuntu only (ignore if gives error)
 
-git clone http://git.veripool.org/git/verilator   # Only first time
+git clone https://git.veripool.org/git/verilator   # Only first time
 ## Note the URL above is not a page you can see with a browser, it's for git only
 
 # Every time you need to build:
@@ -117,7 +117,7 @@ Downloads]; we presume you know how to use it, and is not described here.)
 
 Get the sources from the repository: (You need do this only once, ever.)
 
-   git clone http://git.veripool.org/git/verilator   # Only first time
+   git clone https://git.veripool.org/git/verilator   # Only first time
    ## Note the URL above is not a page you can see with a browser, it's for git only
 
 Enter the checkout and determine what version/branch to use:
@@ -254,8 +254,8 @@ set in your environment; it is built into the executable.
 == Announcements
 
 To get notified of new releases, login to
-http://www.veripool.org[Veripool], and click the "watch" button near the
-top right under http://www.veripool.org/projects/verilator/news[Verilator
+https://www.veripool.org[Veripool], and click the "watch" button near the
+top right under https://www.veripool.org/projects/verilator/news[Verilator
 News].
 
 == Directory Structure
diff --git a/docs/internals.adoc b/docs/internals.adoc
index bde0e2c3c..0880e5ce0 100644
--- a/docs/internals.adoc
+++ b/docs/internals.adoc
@@ -103,7 +103,7 @@ the pass.
 A number of passes use graph algorithms, and the class `V3Graph` is
 provided to represent those graphs. Graphs are directed, and algorithms are
 provided to manipulate the graphs and to output them in
-http://www.graphviz.org[GraphViz] dot format. `V3Graph.h` provides
+https://www.graphviz.org[GraphViz] dot format. `V3Graph.h` provides
 documentation of this class.
 
 ==== `V3GraphVertex`
@@ -744,7 +744,7 @@ into the obj_dir, .tree and .dot files.
 === .dot Output
 
 Dot files are dumps of internal graphs in
-http://www.graphviz.org[Graphviz] dot format.  When a dot file is dumped,
+https://www.graphviz.org[Graphviz] dot format.  When a dot file is dumped,
 Verilator will also print a line on stdout that can be used to format the
 output, for example:
 
diff --git a/src/V3Error.cpp b/src/V3Error.cpp
index 90a742f84..fbf6f6a53 100644
--- a/src/V3Error.cpp
+++ b/src/V3Error.cpp
@@ -228,7 +228,7 @@ void V3Error::v3errorEnd(std::ostringstream& sstr, const string& locationStr) {
             if (!inFatal) {
                 inFatal = true;
                 if (s_tellManual==1) {
-                    std::cerr<<warnMore()<<"... See the manual and http://www.veripool.org/verilator for more assistance."<<endl;
+                    std::cerr<<warnMore()<<"... See the manual and https://verilator.org for more assistance."<<endl;
                     s_tellManual = 2;
                 }
 #ifndef _V3ERROR_NO_GLOBAL_
diff --git a/src/V3Graph.cpp b/src/V3Graph.cpp
index 981a96a05..24af2f84d 100644
--- a/src/V3Graph.cpp
+++ b/src/V3Graph.cpp
@@ -281,7 +281,7 @@ void V3Graph::loopsVertexCb(V3GraphVertex* vertexp) {
 }
 
 void V3Graph::dump(std::ostream& os) {
-    // This generates a file used by graphviz, http://www.graphviz.org
+    // This generates a file used by graphviz, https://www.graphviz.org
     os<<" Graph:\n";
     // Print vertices
     for (V3GraphVertex* vertexp = verticesBeginp(); vertexp; vertexp=vertexp->verticesNextp()) {
@@ -322,7 +322,7 @@ void V3Graph::dumpDotFilePrefixedAlways(const string& nameComment, bool colorAsS
 }
 
 void V3Graph::dumpDotFile(const string& filename, bool colorAsSubgraph) const {
-    // This generates a file used by graphviz, http://www.graphviz.org
+    // This generates a file used by graphviz, https://www.graphviz.org
     // "hardcoded" parameters:
     const vl_unique_ptr<std::ofstream> logp (V3File::new_ofstream(filename));
     if (logp->fail()) v3fatal("Can't write "<<filename);
diff --git a/src/V3Options.cpp b/src/V3Options.cpp
index 7acd5c136..f41e12d44 100644
--- a/src/V3Options.cpp
+++ b/src/V3Options.cpp
@@ -1401,7 +1401,7 @@ void V3Options::showVersion(bool verbose) {
     cout << "License Version 2.0.\n";
 
     cout <<endl;
-    cout << "See http://www.veripool.org/verilator for documentation\n";
+    cout << "See https://verilator.org for documentation\n";
 
     cout <<endl;
     cout << "Summary of configuration:\n";
diff --git a/src/VlcMain.cpp b/src/VlcMain.cpp
index c1e49db96..215ab3f86 100644
--- a/src/VlcMain.cpp
+++ b/src/VlcMain.cpp
@@ -139,7 +139,7 @@ void VlcOptions::showVersion(bool verbose) {
     cout << "License Version 2.0.\n";
 
     cout <<endl;
-    cout << "See http://www.veripool.org/verilator for documentation\n";
+    cout << "See https://verilator.org for documentation\n";
 }
 
 //######################################################################
diff --git a/src/bisonpre b/src/bisonpre
index f1b88c92d..04e4dfe2b 100755
--- a/src/bisonpre
+++ b/src/bisonpre
@@ -568,9 +568,9 @@ Specify the name of the bison executable, defaults to "bison."
 
 =head1 DISTRIBUTION
 
-This is part of the L<http://www.veripool.org/> free Verilog EDA software
+This is part of the L<https://www.veripool.org/> free Verilog EDA software
 tool suite.  The latest version is available from CPAN and from
-L<http://www.veripool.org/>.
+L<https://www.veripool.org/>.
 
 Copyright 2008-2019 by Wilson Snyder.  This package is free software; you
 can redistribute it and/or modify it under the terms of either the GNU
diff --git a/src/cppcheck_filtered b/src/cppcheck_filtered
index aa0f6dc8c..de51dc5bd 100755
--- a/src/cppcheck_filtered
+++ b/src/cppcheck_filtered
@@ -216,9 +216,9 @@ Print the version number and exit.
 
 =head1 DISTRIBUTION
 
-This is part of the L<http://www.veripool.org/> free Verilog EDA software
+This is part of the L<https://www.veripool.org/> free Verilog EDA software
 tool suite.  The latest version is available from CPAN and from
-L<http://www.veripool.org/>.
+L<https://www.veripool.org/>.
 
 Copyright 2014-2019 by Wilson Snyder.  This package is free software; you
 can redistribute it and/or modify it under the terms of either the GNU
diff --git a/test_regress/t/t_fuzz_genintf_bad.out b/test_regress/t/t_fuzz_genintf_bad.out
index 68af1a752..d8e9eee16 100644
--- a/test_regress/t/t_fuzz_genintf_bad.out
+++ b/test_regress/t/t_fuzz_genintf_bad.out
@@ -6,4 +6,4 @@
                                                  : ... In instance t
          j.e(0),
           ^
-                        ... See the manual and http://www.veripool.org/verilator for more assistance.
+                        ... See the manual and https://verilator.org for more assistance.
diff --git a/test_regress/t/t_fuzz_triand_bad.out b/test_regress/t/t_fuzz_triand_bad.out
index 339d404de..aba49b72e 100644
--- a/test_regress/t/t_fuzz_triand_bad.out
+++ b/test_regress/t/t_fuzz_triand_bad.out
@@ -6,4 +6,4 @@
                                                : ... In instance t
    tri g=g.and.g;
            ^~~
-                        ... See the manual and http://www.veripool.org/verilator for more assistance.
+                        ... See the manual and https://verilator.org for more assistance.