diff --git a/.github/workflows/binary-gems.yml b/.github/workflows/binary-gems.yml
index b66c46978..97c64ff51 100644
--- a/.github/workflows/binary-gems.yml
+++ b/.github/workflows/binary-gems.yml
@@ -138,7 +138,7 @@ jobs:
               param([string]$zipfile, [string]$outpath)
               [System.IO.Compression.ZipFile]::ExtractToDirectory($zipfile, $outpath)
           }
-          $(new-object net.webclient).DownloadFile("http://get.enterprisedb.com/postgresql/postgresql-$env:PGVERSION-binaries.zip", "postgresql-binaries.zip")
+          $(new-object net.webclient).DownloadFile("https://get.enterprisedb.com/postgresql/postgresql-$env:PGVERSION-binaries.zip", "postgresql-binaries.zip")
           Unzip "postgresql-binaries.zip" "."
           echo "$pwd/pgsql/bin"  | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
 
diff --git a/.github/workflows/source-gem.yml b/.github/workflows/source-gem.yml
index 8c4b2ff5f..b1a6e9e78 100644
--- a/.github/workflows/source-gem.yml
+++ b/.github/workflows/source-gem.yml
@@ -115,7 +115,7 @@ jobs:
               [System.IO.Compression.ZipFile]::ExtractToDirectory($zipfile, $outpath)
           }
 
-          $(new-object net.webclient).DownloadFile("http://get.enterprisedb.com/postgresql/postgresql-$env:PGVERSION-binaries.zip", "postgresql-binaries.zip")
+          $(new-object net.webclient).DownloadFile("https://get.enterprisedb.com/postgresql/postgresql-$env:PGVERSION-binaries.zip", "postgresql-binaries.zip")
           Unzip "postgresql-binaries.zip" "."
           echo "$env:RI_DEVKIT$env:MINGW_PREFIX/bin;$env:RI_DEVKIT/usr/bin;$pwd/pgsql/bin"  | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
           echo "PGUSER=$env:USERNAME"  | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
diff --git a/ext/extconf.rb b/ext/extconf.rb
index ec3899d7b..f331888b5 100644
--- a/ext/extconf.rb
+++ b/ext/extconf.rb
@@ -28,13 +28,13 @@
 	require 'mini_portile2'
 
 	OPENSSL_VERSION = ENV['OPENSSL_VERSION'] || '3.6.0'
-	OPENSSL_SOURCE_URI = "http://www.openssl.org/source/openssl-#{OPENSSL_VERSION}.tar.gz"
+	OPENSSL_SOURCE_URI = "https://www.openssl.org/source/openssl-#{OPENSSL_VERSION}.tar.gz"
 
 	KRB5_VERSION = ENV['KRB5_VERSION'] || '1.22.1'
-	KRB5_SOURCE_URI = "http://kerberos.org/dist/krb5/#{KRB5_VERSION[/^(\d+\.\d+)/]}/krb5-#{KRB5_VERSION}.tar.gz"
+	KRB5_SOURCE_URI = "https://kerberos.org/dist/krb5/#{KRB5_VERSION[/^(\d+\.\d+)/]}/krb5-#{KRB5_VERSION}.tar.gz"
 
 	POSTGRESQL_VERSION = ENV['POSTGRESQL_VERSION'] || '18.1'
-	POSTGRESQL_SOURCE_URI = "http://ftp.postgresql.org/pub/source/v#{POSTGRESQL_VERSION}/postgresql-#{POSTGRESQL_VERSION}.tar.bz2"
+	POSTGRESQL_SOURCE_URI = "https://ftp.postgresql.org/pub/source/v#{POSTGRESQL_VERSION}/postgresql-#{POSTGRESQL_VERSION}.tar.bz2"
 
 	class BuildRecipe < MiniPortile
 		def initialize(name, version, files)