diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3dacb049..7838104a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## master / unreleased
 
+* [DEPENDENCY] update memcached docker tag to v1.6.40 #580
 * [DEPENDENCY] update prom/memcached-exporter docker tag to v0.15.5 #581
 
 ## 3.1.0 / 2026-02-24
diff --git a/README.md b/README.md
index 3fe66eb4..74f3128b 100644
--- a/README.md
+++ b/README.md
@@ -389,7 +389,7 @@ Kubernetes: `^1.19.0-0`
 | memcached-blocks-index.​disableValidation | bool | `false` | Bypass validation of the memcached configuration in case a custom image is in use |
 | memcached-blocks-index.​enabled | bool | `true` | Enables support for block index caching |
 | memcached-blocks-index.​image.​repository | string | `"memcached"` |  |
-| memcached-blocks-index.​image.​tag | string | `"1.6.39"` |  |
+| memcached-blocks-index.​image.​tag | string | `"1.6.40"` |  |
 | memcached-blocks-index.​metrics.​enabled | bool | `true` |  |
 | memcached-blocks-index.​metrics.​image.​repository | string | `"prom/memcached-exporter"` |  |
 | memcached-blocks-index.​metrics.​image.​tag | string | `"v0.15.5"` |  |
@@ -403,7 +403,7 @@ Kubernetes: `^1.19.0-0`
 | memcached-blocks-metadata.​disableValidation | bool | `false` | Bypass validation of the memcached configuration in case a custom image is in use |
 | memcached-blocks-metadata.​enabled | bool | `true` | Enables support for block metadata caching |
 | memcached-blocks-metadata.​image.​repository | string | `"memcached"` |  |
-| memcached-blocks-metadata.​image.​tag | string | `"1.6.39"` |  |
+| memcached-blocks-metadata.​image.​tag | string | `"1.6.40"` |  |
 | memcached-blocks-metadata.​metrics.​enabled | bool | `true` |  |
 | memcached-blocks-metadata.​metrics.​image.​repository | string | `"prom/memcached-exporter"` |  |
 | memcached-blocks-metadata.​metrics.​image.​tag | string | `"v0.15.5"` |  |
@@ -417,7 +417,7 @@ Kubernetes: `^1.19.0-0`
 | memcached-blocks.​disableValidation | bool | `false` | Bypass validation of the memcached configuration in case a custom image is in use |
 | memcached-blocks.​enabled | bool | `true` | Enables support for block caching |
 | memcached-blocks.​image.​repository | string | `"memcached"` |  |
-| memcached-blocks.​image.​tag | string | `"1.6.39"` |  |
+| memcached-blocks.​image.​tag | string | `"1.6.40"` |  |
 | memcached-blocks.​metrics.​enabled | bool | `true` |  |
 | memcached-blocks.​metrics.​image.​repository | string | `"prom/memcached-exporter"` |  |
 | memcached-blocks.​metrics.​image.​tag | string | `"v0.15.5"` |  |
@@ -431,7 +431,7 @@ Kubernetes: `^1.19.0-0`
 | memcached-frontend.​disableValidation | bool | `false` | Bypass validation of the memcached configuration in case a custom image is in use |
 | memcached-frontend.​enabled | bool | `true` | Enables support for caching queries in the frontend |
 | memcached-frontend.​image.​repository | string | `"memcached"` |  |
-| memcached-frontend.​image.​tag | string | `"1.6.39"` |  |
+| memcached-frontend.​image.​tag | string | `"1.6.40"` |  |
 | memcached-frontend.​metrics.​enabled | bool | `true` |  |
 | memcached-frontend.​metrics.​image.​repository | string | `"prom/memcached-exporter"` |  |
 | memcached-frontend.​metrics.​image.​tag | string | `"v0.15.5"` |  |
diff --git a/values.yaml b/values.yaml
index a9b5ae55..cc028349 100644
--- a/values.yaml
+++ b/values.yaml
@@ -1685,7 +1685,7 @@ memcached-frontend:
     - -m 1024
   image:
     repository: memcached
-    tag: "1.6.39"
+    tag: "1.6.40"
   metrics:
     enabled: true
     image:
@@ -1710,7 +1710,7 @@ memcached-blocks-index:
     - -m 1024
   image:
     repository: memcached
-    tag: "1.6.39"
+    tag: "1.6.40"
   metrics:
     enabled: true
     image:
@@ -1735,7 +1735,7 @@ memcached-blocks:
     - -m 1024
   image:
     repository: memcached
-    tag: "1.6.39"
+    tag: "1.6.40"
   metrics:
     enabled: true
     image:
@@ -1760,7 +1760,7 @@ memcached-blocks-metadata:
     - -m 1024
   image:
     repository: memcached
-    tag: "1.6.39"
+    tag: "1.6.40"
   metrics:
     enabled: true
     image: