diff --git a/apps/codecs.c b/apps/codecs.c
index 4d2dd34ce0..9f34d26e14 100644
--- a/apps/codecs.c
+++ b/apps/codecs.c
@@ -203,8 +203,9 @@ static int codec_load_ram(struct codec_api *api)
         return CODEC_ERROR;
     }
 
-    if (hdr->api_version > CODEC_API_VERSION
-        || hdr->api_version < CODEC_MIN_API_VERSION) {
+    if (hdr->api_version != CODEC_API_VERSION ||
+        c_hdr->api_size > sizeof(struct codec_api))
+    {
         logf("codec api version error");
         lc_close(curr_handle);
         curr_handle = NULL;
diff --git a/apps/plugin.c b/apps/plugin.c
index cdbe340ddd..1a0aedf3cc 100644
--- a/apps/plugin.c
+++ b/apps/plugin.c
@@ -864,10 +864,8 @@ int plugin_load(const char* plugin, const void* parameter)
     }
 
     p_hdr = lc_get_header(current_plugin_handle);
-
     hdr = p_hdr ? &p_hdr->lc_hdr : NULL;
 
-
     if (hdr == NULL
         || hdr->magic != PLUGIN_MAGIC
         || hdr->target_id != TARGET_ID
@@ -881,13 +879,15 @@ int plugin_load(const char* plugin, const void* parameter)
         splash(HZ*2, ID2P(LANG_PLUGIN_WRONG_MODEL));
         return -1;
     }
-    if (hdr->api_version > PLUGIN_API_VERSION
-        || hdr->api_version < PLUGIN_MIN_API_VERSION)
+
+    if (hdr->api_version != PLUGIN_API_VERSION ||
+        p_hdr->api_size > sizeof(struct plugin_api))
     {
         lc_close(current_plugin_handle);
         splash(HZ*2, ID2P(LANG_PLUGIN_WRONG_VERSION));
         return -1;
     }
+
 #if (CONFIG_PLATFORM & PLATFORM_NATIVE)
     /* tlsf crashes observed on arm with 0x4 aligned addresses */
     plugin_size = ALIGN_UP(hdr->end_addr - pluginbuf, 0x8);
diff --git a/apps/plugin.h b/apps/plugin.h
index 286a5e2794..cf6a1bc4e4 100644
--- a/apps/plugin.h
+++ b/apps/plugin.h
@@ -157,13 +157,12 @@ int plugin_open(const char *plugin, const char *parameter);
 
 #define PLUGIN_MAGIC 0x526F634B /* RocK */
 
-/* increase this every time the api struct changes */
-#define PLUGIN_API_VERSION 265
-
-/* update this to latest version if a change to the api struct breaks
-   backwards compatibility (and please take the opportunity to sort in any
-   new function which are "waiting" at the end of the function table) */
-#define PLUGIN_MIN_API_VERSION 260
+/*
+ * Increment this whenever a change breaks the plugin ABI,
+ * when this happens please take the opportunity to sort in
+ * any new functions "waiting" at the end of the list.
+ */
+#define PLUGIN_API_VERSION 266
 
 /* 239 Marks the removal of ARCHOS HWCODEC and CHARCELL */
 
@@ -962,6 +961,7 @@ struct plugin_header {
     struct lc_header lc_hdr; /* must be the first */
     enum plugin_status(*entry_point)(const void*);
     const struct plugin_api **api;
+    size_t api_size;
 };
 
 #ifdef PLUGIN
@@ -973,14 +973,15 @@ extern unsigned char plugin_end_addr[];
         const struct plugin_header __header \
         __attribute__ ((section (".header")))= { \
         { PLUGIN_MAGIC, TARGET_ID, PLUGIN_API_VERSION, \
-        plugin_start_addr, plugin_end_addr }, plugin__start, &rb };
+          plugin_start_addr, plugin_end_addr, }, \
+        plugin__start, &rb, sizeof(struct plugin_api) };
 #else /* PLATFORM_HOSTED */
 #define PLUGIN_HEADER \
         const struct plugin_api *rb DATA_ATTR; \
         const struct plugin_header __header \
         __attribute__((visibility("default"))) = { \
-        { PLUGIN_MAGIC, TARGET_ID, PLUGIN_API_VERSION, NULL, NULL }, \
-        plugin__start, &rb };
+            { PLUGIN_MAGIC, TARGET_ID, PLUGIN_API_VERSION, NULL, NULL }, \
+            plugin__start, &rb, sizeof(struct plugin_api) };
 #endif /* CONFIG_PLATFORM */
 #endif /* PLUGIN */
 
diff --git a/apps/plugins/imageviewer/image_decoder.c b/apps/plugins/imageviewer/image_decoder.c
index eab1c01dbc..0c1776daaa 100644
--- a/apps/plugins/imageviewer/image_decoder.c
+++ b/apps/plugins/imageviewer/image_decoder.c
@@ -155,7 +155,10 @@ const struct image_decoder *load_decoder(struct loader_info *loader_info)
         goto error_close;
     }
 
-    if (lc_hdr->api_version != IMGDEC_API_VERSION)
+    if (lc_hdr->api_version != IMGDEC_API_VERSION ||
+        hdr->img_api_size > sizeof(struct imgdec_api) ||
+        hdr->plugin_api_version != PLUGIN_API_VERSION ||
+        hdr->plugin_api_size > sizeof(struct plugin_api))
     {
         rb->splashf(2*HZ, "%s decoder: Incompatible version.", name);
         goto error_close;
diff --git a/apps/plugins/imageviewer/imageviewer.h b/apps/plugins/imageviewer/imageviewer.h
index 19b5db15bb..ac15df5960 100644
--- a/apps/plugins/imageviewer/imageviewer.h
+++ b/apps/plugins/imageviewer/imageviewer.h
@@ -136,14 +136,17 @@ struct image_decoder {
                             int x, int y, int width, int height);
 };
 
-#define IMGDEC_API_VERSION  (PLUGIN_API_VERSION << 4 | 0)
+#define IMGDEC_API_VERSION 1
 
 /* image decoder header */
 struct imgdec_header {
     struct lc_header lc_hdr; /* must be the first */
     const struct image_decoder *decoder;
     const struct plugin_api **api;
+    unsigned short plugin_api_version;
+    size_t plugin_api_size;
     const struct imgdec_api **img_api;
+    size_t img_api_size;
 };
 
 #ifdef IMGDEC
@@ -157,15 +160,18 @@ extern const struct image_decoder image_decoder;
         const struct imgdec_header __header \
         __attribute__ ((section (".header")))= { \
         { PLUGIN_MAGIC, TARGET_ID, IMGDEC_API_VERSION, \
-        plugin_start_addr, plugin_end_addr }, &image_decoder, &rb, &iv };
+          plugin_start_addr, plugin_end_addr, }, &image_decoder, \
+          &rb, PLUGIN_API_VERSION, sizeof(struct plugin_api), \
+          &iv, sizeof(struct imgdec_api) };
 #else /* PLATFORM_HOSTED */
 #define IMGDEC_HEADER \
         const struct plugin_api *rb DATA_ATTR; \
         const struct imgdec_api *iv DATA_ATTR; \
         const struct imgdec_header __header \
         __attribute__((visibility("default"))) = { \
-        { PLUGIN_MAGIC, TARGET_ID, IMGDEC_API_VERSION, \
-        NULL, NULL }, &image_decoder, &rb, &iv };
+        { PLUGIN_MAGIC, TARGET_ID, IMGDEC_API_VERSION, NULL, NULL }, \
+          &image_decoder, &rb, PLUGIN_API_VERSION, sizeof(struct plugin_api), \
+          &iv, sizeof(struct imgdec_api), };
 #endif /* CONFIG_PLATFORM */
 #endif
 
diff --git a/apps/plugins/lib/overlay.c b/apps/plugins/lib/overlay.c
index 0ecc1bf3e7..065273534e 100644
--- a/apps/plugins/lib/overlay.c
+++ b/apps/plugins/lib/overlay.c
@@ -83,9 +83,8 @@ enum plugin_status run_overlay(const void* parameter,
         goto error_close;
     }
 
-    
-    if (hdr->api_version > PLUGIN_API_VERSION
-        || hdr->api_version < PLUGIN_MIN_API_VERSION)
+    if (hdr->api_version != PLUGIN_API_VERSION ||
+        p_hdr->api_size > sizeof(struct plugin_api))
     {
         rb->splashf(2*HZ, "%s overlay: Incompatible version.", name);
         goto error_close;
diff --git a/lib/rbcodec/codecs/codecs.h b/lib/rbcodec/codecs/codecs.h
index fd19dcb6b5..aa9d2e8a0d 100644
--- a/lib/rbcodec/codecs/codecs.h
+++ b/lib/rbcodec/codecs/codecs.h
@@ -71,13 +71,12 @@
 /* magic for encoder codecs */
 #define CODEC_ENC_MAGIC 0x52454E43 /* RENC */
 
-/* increase this every time the api struct changes */
-#define CODEC_API_VERSION 49
-
-/* update this to latest version if a change to the api struct breaks
-   backwards compatibility (and please take the opportunity to sort in any
-   new function which are "waiting" at the end of the function table) */
-#define CODEC_MIN_API_VERSION 49
+/*
+ * Increment this whenever a change breaks the codec ABI,
+ * when this happens please take the opportunity to sort in
+ * any new functions "waiting" at the end of the list.
+ */
+#define CODEC_API_VERSION 50
 
 /* reasons for calling codec main entrypoint */
 enum codec_entry_call_reason {
@@ -228,6 +227,7 @@ struct codec_header {
     enum codec_status(*entry_point)(enum codec_entry_call_reason reason);
     enum codec_status(*run_proc)(void);
     struct codec_api **api;
+    size_t api_size;
     void * rec_extension[]; /* extension for encoders */
 };
 
@@ -241,15 +241,16 @@ extern unsigned char plugin_end_addr[];
         const struct codec_header __header \
         __attribute__ ((section (".header")))= { \
         { CODEC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
-        plugin_start_addr, plugin_end_addr }, codec_start, \
-        codec_run, &ci };
+          plugin_start_addr, plugin_end_addr }, \
+        codec_start, codec_run, &ci, sizeof(struct codec_api) };
 /* encoders */
 #define CODEC_ENC_HEADER \
         const struct codec_header __header \
         __attribute__ ((section (".header")))= { \
         { CODEC_ENC_MAGIC, TARGET_ID, CODEC_API_VERSION, \
-        plugin_start_addr, plugin_end_addr }, codec_start, \
-        codec_run, &ci, { enc_callback } };
+          plugin_start_addr, plugin_end_addr }, \
+        codec_start, codec_run, &ci, sizeof(struct codec_api), \
+        { enc_callback } };
 
 #else /* def SIMULATOR */
 /* decoders */
@@ -257,13 +258,14 @@ extern unsigned char plugin_end_addr[];
         const struct codec_header __header \
         __attribute__((visibility("default"))) = { \
         { CODEC_MAGIC, TARGET_ID, CODEC_API_VERSION, NULL, NULL }, \
-        codec_start, codec_run, &ci };
+        codec_start, codec_run, &ci, sizeof(struct codec_api) };
 /* encoders */
 #define CODEC_ENC_HEADER \
         const struct codec_header __header \
         __attribute__((visibility("default"))) = { \
         { CODEC_ENC_MAGIC, TARGET_ID, CODEC_API_VERSION, NULL, NULL }, \
-        codec_start, codec_run, &ci, { enc_callback } };
+        codec_start, codec_run, &ci, sizeof(struct codec_api), \
+        { enc_callback } };
 #endif /* SIMULATOR */
 #endif /* CODEC */