diff --git a/packages/eventsourcing-redux-chat-example/yarn.lock b/packages/eventsourcing-redux-chat-example/yarn.lock
index 7e28488..c04e091 100644
--- a/packages/eventsourcing-redux-chat-example/yarn.lock
+++ b/packages/eventsourcing-redux-chat-example/yarn.lock
@@ -6419,6 +6419,11 @@ prop-types@^15.6.1, prop-types@^15.6.2, prop-types@^15.7.2:
     object-assign "^4.1.1"
     react-is "^16.8.1"
 
+property-expr@2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/property-expr/-/property-expr-2.0.4.tgz#37b925478e58965031bb612ec5b3260f8241e910"
+  integrity sha512-sFPkHQjVKheDNnPvotjQmm3KD3uk1fWKUN7CrpdbwmUx3CrG3QiM8QpTSimvig5vTXmTvjz7+TDvXOI9+4rkcg==
+
 property-expr@^1.5.0:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/property-expr/-/property-expr-1.5.1.tgz#22e8706894a0c8e28d58735804f6ba3a3673314f"
diff --git a/yarn.lock b/yarn.lock
index 99e37c8..52cc7d5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10646,9 +10646,9 @@ proper-lockfile@^1.2.0:
     retry "^0.10.0"
 
 property-expr@^2.0.0:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/property-expr/-/property-expr-2.0.2.tgz#fff2a43919135553a3bc2fdd94bdb841965b2330"
-  integrity sha512-bc/5ggaYZxNkFKj374aLbEDqVADdYaLcFo8XBkishUWbaAdjlphaBFns9TvRA2pUseVL/wMFmui9X3IdNDU37g==
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/property-expr/-/property-expr-2.0.4.tgz#37b925478e58965031bb612ec5b3260f8241e910"
+  integrity sha512-sFPkHQjVKheDNnPvotjQmm3KD3uk1fWKUN7CrpdbwmUx3CrG3QiM8QpTSimvig5vTXmTvjz7+TDvXOI9+4rkcg==
 
 proto-list@~1.2.1:
   version "1.2.4"