diff --git a/dist/post_run/index.js b/dist/post_run/index.js
index 8f1e7b2..6154b0d 100644
--- a/dist/post_run/index.js
+++ b/dist/post_run/index.js
@@ -93207,13 +93207,17 @@ const versionRe = /^v(\d+)\.(\d+)(?:\.(\d+))?$/;
 const modVersionRe = /github.com\/golangci\/golangci-lint\s(v\S+)/;
 const parseVersion = (s) => {
     if (s == "latest" || s == "") {
-        // TODO(ldez): it should be replaced with an explicit version (ex: v1.64.0)
-        return null;
+        // TODO(ldez): v2: it should be replaced with "return null"
+        return { major: 1, minor: 64, patch: 7 };
     }
     const match = s.match(versionRe);
     if (!match) {
         throw new Error(`invalid version string '${s}', expected format v1.2 or v1.2.3`);
     }
+    // TODO(ldez): v2: to remove.
+    if (parseInt(match[1]) > 1) {
+        throw new Error(`invalid version string '${s}', golangci-lint v2 is not supported by golangci-lint-action v6, you must update to golangci-lint-action v7.`);
+    }
     return {
         major: parseInt(match[1]),
         minor: parseInt(match[2]),
@@ -93277,7 +93281,6 @@ const fetchVersionMapping = async () => {
         maxRetries: 5,
     });
     try {
-        // TODO(ldez): HEAD should be replaced with an explicit version (ex: v1.64.0).
         const url = `https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/assets/github-action-config-v1.json`;
         const response = await http.get(url);
         if (response.message.statusCode !== 200) {
@@ -93294,8 +93297,12 @@ async function getVersion(mode) {
     core.info(`Finding needed golangci-lint version...`);
     if (mode == install_1.InstallMode.GoInstall) {
         const v = core.getInput(`version`);
-        // TODO(ldez): latest should be replaced with an explicit version (ex: v1.64.0).
-        return { TargetVersion: v ? v : "latest" };
+        // TODO(ldez): v2: to remove.
+        if (v == "latest") {
+            return { TargetVersion: "v1.64.7" };
+        }
+        // TODO(ldez): v2: "v1.64.7" should be replaced with "latest".
+        return { TargetVersion: v ? v : "v1.64.7" };
     }
     const reqVersion = getRequestedVersion();
     // if the patched version is passed, just use it
diff --git a/dist/run/index.js b/dist/run/index.js
index 342db06..aa15dd5 100644
--- a/dist/run/index.js
+++ b/dist/run/index.js
@@ -93207,13 +93207,17 @@ const versionRe = /^v(\d+)\.(\d+)(?:\.(\d+))?$/;
 const modVersionRe = /github.com\/golangci\/golangci-lint\s(v\S+)/;
 const parseVersion = (s) => {
     if (s == "latest" || s == "") {
-        // TODO(ldez): it should be replaced with an explicit version (ex: v1.64.0)
-        return null;
+        // TODO(ldez): v2: it should be replaced with "return null"
+        return { major: 1, minor: 64, patch: 7 };
     }
     const match = s.match(versionRe);
     if (!match) {
         throw new Error(`invalid version string '${s}', expected format v1.2 or v1.2.3`);
     }
+    // TODO(ldez): v2: to remove.
+    if (parseInt(match[1]) > 1) {
+        throw new Error(`invalid version string '${s}', golangci-lint v2 is not supported by golangci-lint-action v6, you must update to golangci-lint-action v7.`);
+    }
     return {
         major: parseInt(match[1]),
         minor: parseInt(match[2]),
@@ -93277,7 +93281,6 @@ const fetchVersionMapping = async () => {
         maxRetries: 5,
     });
     try {
-        // TODO(ldez): HEAD should be replaced with an explicit version (ex: v1.64.0).
         const url = `https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/assets/github-action-config-v1.json`;
         const response = await http.get(url);
         if (response.message.statusCode !== 200) {
@@ -93294,8 +93297,12 @@ async function getVersion(mode) {
     core.info(`Finding needed golangci-lint version...`);
     if (mode == install_1.InstallMode.GoInstall) {
         const v = core.getInput(`version`);
-        // TODO(ldez): latest should be replaced with an explicit version (ex: v1.64.0).
-        return { TargetVersion: v ? v : "latest" };
+        // TODO(ldez): v2: to remove.
+        if (v == "latest") {
+            return { TargetVersion: "v1.64.7" };
+        }
+        // TODO(ldez): v2: "v1.64.7" should be replaced with "latest".
+        return { TargetVersion: v ? v : "v1.64.7" };
     }
     const reqVersion = getRequestedVersion();
     // if the patched version is passed, just use it
diff --git a/src/version.ts b/src/version.ts
index 78f427f..36b71c8 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -18,8 +18,8 @@ const modVersionRe = /github.com\/golangci\/golangci-lint\s(v\S+)/
 
 const parseVersion = (s: string): Version => {
   if (s == "latest" || s == "") {
-    // TODO(ldez): it should be replaced with an explicit version (ex: v1.64.0)
-    return null
+    // TODO(ldez): v2: it should be replaced with "return null"
+    return { major: 1, minor: 64, patch: 7 }
   }
 
   const match = s.match(versionRe)
@@ -27,6 +27,13 @@ const parseVersion = (s: string): Version => {
     throw new Error(`invalid version string '${s}', expected format v1.2 or v1.2.3`)
   }
 
+  // TODO(ldez): v2: to remove.
+  if (parseInt(match[1]) > 1) {
+    throw new Error(
+      `invalid version string '${s}', golangci-lint v2 is not supported by golangci-lint-action v6, you must update to golangci-lint-action v7.`
+    )
+  }
+
   return {
     major: parseInt(match[1]),
     minor: parseInt(match[2]),
@@ -115,7 +122,6 @@ const fetchVersionMapping = async (): Promise<VersionMapping> => {
     maxRetries: 5,
   })
   try {
-    // TODO(ldez): HEAD should be replaced with an explicit version (ex: v1.64.0).
     const url = `https://raw.githubusercontent.com/golangci/golangci-lint/HEAD/assets/github-action-config-v1.json`
     const response: httpm.HttpClientResponse = await http.get(url)
     if (response.message.statusCode !== 200) {
@@ -134,8 +140,13 @@ export async function getVersion(mode: InstallMode): Promise<VersionInfo> {
 
   if (mode == InstallMode.GoInstall) {
     const v: string = core.getInput(`version`)
-    // TODO(ldez): latest should be replaced with an explicit version (ex: v1.64.0).
-    return { TargetVersion: v ? v : "latest" }
+    // TODO(ldez): v2: to remove.
+    if (v == "latest") {
+      return { TargetVersion: "v1.64.7" }
+    }
+
+    // TODO(ldez): v2: "v1.64.7" should be replaced with "latest".
+    return { TargetVersion: v ? v : "v1.64.7" }
   }
 
   const reqVersion = getRequestedVersion()