diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index cb00897..ef881fe 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -11,7 +11,7 @@
   "plugins": [
     {
       "name": "ask-questions-if-underspecified",
-      "version": "1.0.0",
+      "version": "1.0.1",
       "description": "Clarify requirements before implementing. When doubting, ask questions.",
       "author": {
         "name": "Kevin Valerio",
@@ -31,7 +31,7 @@
     },
     {
       "name": "building-secure-contracts",
-      "version": "1.0.0",
+      "version": "1.0.1",
       "description": "Comprehensive smart contract security toolkit based on Trail of Bits' Building Secure Contracts framework. Includes vulnerability scanners for 6 blockchains and 5 development guideline assistants.",
       "author": {
         "name": "Omar Inuwa"
@@ -193,7 +193,7 @@
     },
     {
       "name": "modern-python",
-      "version": "1.2.0",
+      "version": "1.3.0",
       "description": "Modern Python best practices. Use when creating new Python projects, and writing Python scripts, or migrating existing projects from legacy tools.",
       "author": {
         "name": "William Tan",
diff --git a/CLAUDE.md b/CLAUDE.md
index 5083471..eec6bbf 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -196,3 +196,7 @@ Before submitting:
 - [ ] Plugin has README.md
 - [ ] Added to root README.md table
 - [ ] Registered in marketplace.json
+
+**Version updates (for existing plugins):**
+- [ ] Increment version in both `plugin.json` and `.claude-plugin/marketplace.json` when making substantive changes (clients only update plugins when the version number increases)
+- [ ] Ensure version numbers match between `plugin.json` and `.claude-plugin/marketplace.json`
diff --git a/plugins/ask-questions-if-underspecified/.claude-plugin/plugin.json b/plugins/ask-questions-if-underspecified/.claude-plugin/plugin.json
index ceb05be..e005dfd 100644
--- a/plugins/ask-questions-if-underspecified/.claude-plugin/plugin.json
+++ b/plugins/ask-questions-if-underspecified/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "ask-questions-if-underspecified",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Clarify requirements before implementing. Do not use automatically, only when invoked explicitly.",
   "author": {
     "name": "Kevin Valerio",
diff --git a/plugins/building-secure-contracts/.claude-plugin/plugin.json b/plugins/building-secure-contracts/.claude-plugin/plugin.json
index e829289..0da9ba1 100644
--- a/plugins/building-secure-contracts/.claude-plugin/plugin.json
+++ b/plugins/building-secure-contracts/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "building-secure-contracts",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Comprehensive smart contract security toolkit based on Trail of Bits' Building Secure Contracts framework. Includes vulnerability scanners for 6 blockchains and 5 development guideline assistants.",
   "author": {
     "name": "Omar Inuwa",
diff --git a/plugins/modern-python/.claude-plugin/plugin.json b/plugins/modern-python/.claude-plugin/plugin.json
index b863f63..651fe66 100644
--- a/plugins/modern-python/.claude-plugin/plugin.json
+++ b/plugins/modern-python/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "modern-python",
-  "version": "1.2.0",
+  "version": "1.3.0",
   "description": "Modern Python best practices. Use when creating new Python projects, and writing Python scripts, or migrating existing projects from legacy tools.",
   "author": {
     "name": "William Tan",