diff --git a/build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/toolchain/OracleOpenJdkToolchainResolver.java b/build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/toolchain/OracleOpenJdkToolchainResolver.java
index cfd2d5c1cda7e..dbf60e1b4f4d8 100644
--- a/build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/toolchain/OracleOpenJdkToolchainResolver.java
+++ b/build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/toolchain/OracleOpenJdkToolchainResolver.java
@@ -62,8 +62,8 @@ record EarlyAccessJdkBuild(JavaLanguageVersion languageVersion, String buildNumb
         @Override
         public String url(String os, String arch, String extension) {
             // example:
-            // http://builds.es-jdk-archive.com/jdks/openjdk/26/openjdk-26-ea+6/openjdk-26-ea+6_linux-aarch64_bin.tar.gz
-            return "http://builds.es-jdk-archive.com/jdks/openjdk/"
+            // https://builds.es-jdk-archive.com/jdks/openjdk/26/openjdk-26-ea+6/openjdk-26-ea+6_linux-aarch64_bin.tar.gz
+            return "https://builds.es-jdk-archive.com/jdks/openjdk/"
                 + languageVersion.asInt()
                 + "/"
                 + "openjdk-"
diff --git a/build-tools-internal/src/test/groovy/org/elasticsearch/gradle/internal/toolchain/OracleOpenJdkToolchainResolverSpec.groovy b/build-tools-internal/src/test/groovy/org/elasticsearch/gradle/internal/toolchain/OracleOpenJdkToolchainResolverSpec.groovy
index 8000316da36ac..df9f70d0a47f6 100644
--- a/build-tools-internal/src/test/groovy/org/elasticsearch/gradle/internal/toolchain/OracleOpenJdkToolchainResolverSpec.groovy
+++ b/build-tools-internal/src/test/groovy/org/elasticsearch/gradle/internal/toolchain/OracleOpenJdkToolchainResolverSpec.groovy
@@ -67,16 +67,16 @@ class OracleOpenJdkToolchainResolverSpec extends AbstractToolchainResolverSpec {
          [24, anyVendor(), LINUX, AARCH64, "https://download.oracle.com/java/GA/jdk24/1f9ff9062db4449d8ca828c504ffae90/36/GPL/openjdk-24_linux-aarch64_bin.tar.gz"],
          [24, anyVendor(), WINDOWS, X86_64, "https://download.oracle.com/java/GA/jdk24/1f9ff9062db4449d8ca828c504ffae90/36/GPL/openjdk-24_windows-x64_bin.zip"],
          // EA build
-         [25, ORACLE, MAC_OS, X86_64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_macos-x64_bin.tar.gz"],
-         [25, ORACLE, MAC_OS, AARCH64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_macos-aarch64_bin.tar.gz"],
-         [25, ORACLE, LINUX, X86_64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_linux-x64_bin.tar.gz"],
-         [25, ORACLE, LINUX, AARCH64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_linux-aarch64_bin.tar.gz"],
-         [25, ORACLE, WINDOWS, X86_64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_windows-x64_bin.zip"],
-         [25, anyVendor(), MAC_OS, X86_64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_macos-x64_bin.tar.gz"],
-         [25, anyVendor(), MAC_OS, AARCH64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_macos-aarch64_bin.tar.gz"],
-         [25, anyVendor(), LINUX, X86_64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_linux-x64_bin.tar.gz"],
-         [25, anyVendor(), LINUX, AARCH64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_linux-aarch64_bin.tar.gz"],
-         [25, anyVendor(), WINDOWS, X86_64, "http://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_windows-x64_bin.zip"]]
+         [25, ORACLE, MAC_OS, X86_64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_macos-x64_bin.tar.gz"],
+         [25, ORACLE, MAC_OS, AARCH64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_macos-aarch64_bin.tar.gz"],
+         [25, ORACLE, LINUX, X86_64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_linux-x64_bin.tar.gz"],
+         [25, ORACLE, LINUX, AARCH64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_linux-aarch64_bin.tar.gz"],
+         [25, ORACLE, WINDOWS, X86_64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_windows-x64_bin.zip"],
+         [25, anyVendor(), MAC_OS, X86_64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_macos-x64_bin.tar.gz"],
+         [25, anyVendor(), MAC_OS, AARCH64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_macos-aarch64_bin.tar.gz"],
+         [25, anyVendor(), LINUX, X86_64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_linux-x64_bin.tar.gz"],
+         [25, anyVendor(), LINUX, AARCH64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_linux-aarch64_bin.tar.gz"],
+         [25, anyVendor(), WINDOWS, X86_64, "https://builds.es-jdk-archive.com/jdks/openjdk/25/openjdk-25-ea+3/openjdk-25-ea+3_windows-x64_bin.zip"]]
     }
 
     @RestoreSystemProperties
@@ -113,7 +113,7 @@ class OracleOpenJdkToolchainResolverSpec extends AbstractToolchainResolverSpec {
     }
 
     private static String urlPrefix(int i) {
-        return "http://builds.es-jdk-archive.com/jdks/openjdk/" + i + "/"
+        return "https://builds.es-jdk-archive.com/jdks/openjdk/" + i + "/"
     }
 
     def unsupportedRequests() {