diff --git a/src/Bicep.LangServer.IntegrationTests/Bicep.LangServer.IntegrationTests.csproj b/src/Bicep.LangServer.IntegrationTests/Bicep.LangServer.IntegrationTests.csproj
index 8ff1b7c5524..e683227c970 100644
--- a/src/Bicep.LangServer.IntegrationTests/Bicep.LangServer.IntegrationTests.csproj
+++ b/src/Bicep.LangServer.IntegrationTests/Bicep.LangServer.IntegrationTests.csproj
@@ -13,7 +13,7 @@
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-    <PackageReference Include="Moq" Version="4.20.69" />
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     <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Include="OmniSharp.Extensions.LanguageClient" Version="0.19.9" />
diff --git a/src/Bicep.LangServer.IntegrationTests/packages.lock.json b/src/Bicep.LangServer.IntegrationTests/packages.lock.json
index 8f613982c3d..08d11442e0b 100644
--- a/src/Bicep.LangServer.IntegrationTests/packages.lock.json
+++ b/src/Bicep.LangServer.IntegrationTests/packages.lock.json
@@ -64,9 +64,9 @@
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diff --git a/src/Bicep.LangServer.UnitTests/Bicep.LangServer.UnitTests.csproj b/src/Bicep.LangServer.UnitTests/Bicep.LangServer.UnitTests.csproj
index bff0a58f147..79f32372d60 100644
--- a/src/Bicep.LangServer.UnitTests/Bicep.LangServer.UnitTests.csproj
+++ b/src/Bicep.LangServer.UnitTests/Bicep.LangServer.UnitTests.csproj
@@ -13,7 +13,7 @@
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-    <PackageReference Include="Moq" Version="4.20.69" />
+    <PackageReference Include="Moq" Version="4.18.4" />
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     <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Include="OmniSharp.Extensions.LanguageClient" Version="0.19.9" />
diff --git a/src/Bicep.LangServer.UnitTests/packages.lock.json b/src/Bicep.LangServer.UnitTests/packages.lock.json
index a70149443ca..2b4ee55ab7f 100644
--- a/src/Bicep.LangServer.UnitTests/packages.lock.json
+++ b/src/Bicep.LangServer.UnitTests/packages.lock.json
@@ -51,9 +51,9 @@
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+        "requested": "[4.18.4, )",
+        "resolved": "4.18.4",
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@@ -2122,7 +2122,7 @@
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+          "Moq": "[4.18.4, )",
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diff --git a/src/Bicep.RegistryModuleTool.IntegrationTests/packages.lock.json b/src/Bicep.RegistryModuleTool.IntegrationTests/packages.lock.json
index 20108a3775f..67944e073ab 100644
--- a/src/Bicep.RegistryModuleTool.IntegrationTests/packages.lock.json
+++ b/src/Bicep.RegistryModuleTool.IntegrationTests/packages.lock.json
@@ -761,8 +761,8 @@
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+        "resolved": "4.18.4",
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@@ -2328,7 +2328,7 @@
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           "JsonPatch.Net": "[2.1.0, )",
-          "Moq": "[4.20.69, )",
+          "Moq": "[4.18.4, )",
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diff --git a/src/Bicep.RegistryModuleTool.TestFixtures/Bicep.RegistryModuleTool.TestFixtures.csproj b/src/Bicep.RegistryModuleTool.TestFixtures/Bicep.RegistryModuleTool.TestFixtures.csproj
index 427c2683a41..03f7e489081 100644
--- a/src/Bicep.RegistryModuleTool.TestFixtures/Bicep.RegistryModuleTool.TestFixtures.csproj
+++ b/src/Bicep.RegistryModuleTool.TestFixtures/Bicep.RegistryModuleTool.TestFixtures.csproj
@@ -11,7 +11,7 @@
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     <PackageReference Include="JsonPatch.Net" Version="2.1.0" />
-    <PackageReference Include="Moq" Version="4.20.69" />
+    <PackageReference Include="Moq" Version="4.18.4" />
     <PackageReference Include="System.IO.Abstractions.TestingHelpers" Version="19.2.69" />
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diff --git a/src/Bicep.RegistryModuleTool.TestFixtures/packages.lock.json b/src/Bicep.RegistryModuleTool.TestFixtures/packages.lock.json
index 92be1d546f2..54b462ed0a4 100644
--- a/src/Bicep.RegistryModuleTool.TestFixtures/packages.lock.json
+++ b/src/Bicep.RegistryModuleTool.TestFixtures/packages.lock.json
@@ -44,9 +44,9 @@
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+        "requested": "[4.18.4, )",
+        "resolved": "4.18.4",
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diff --git a/src/Bicep.RegistryModuleTool.UnitTests/packages.lock.json b/src/Bicep.RegistryModuleTool.UnitTests/packages.lock.json
index 20108a3775f..67944e073ab 100644
--- a/src/Bicep.RegistryModuleTool.UnitTests/packages.lock.json
+++ b/src/Bicep.RegistryModuleTool.UnitTests/packages.lock.json
@@ -761,8 +761,8 @@
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+        "resolved": "4.18.4",
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@@ -2328,7 +2328,7 @@
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           "JsonPatch.Net": "[2.1.0, )",
-          "Moq": "[4.20.69, )",
+          "Moq": "[4.18.4, )",
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diff --git a/src/Bicep.Tools.Benchmark/packages.lock.json b/src/Bicep.Tools.Benchmark/packages.lock.json
index 372295152a1..c0fb43d0c62 100644
--- a/src/Bicep.Tools.Benchmark/packages.lock.json
+++ b/src/Bicep.Tools.Benchmark/packages.lock.json
@@ -669,8 +669,8 @@
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@@ -2195,7 +2195,7 @@
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-          "Moq": "[4.20.69, )",
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