diff --git a/Project.toml b/Project.toml
index 1f0affe..606435d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -52,8 +52,8 @@ Mustache = "=1.0.17"
 NaturalSort = "=1.0.0"
 SkipNan = "^0.2"
 PrecompileTools = "=1.2.0"
-SpmImages = "^0.3.2"
-SpmSpectroscopy = "^0.5"
+SpmImages = "=0.3.2"
+SpmSpectroscopy = "=0.5.2"
 StatsBase = "=0.34.0"
 TranscodingStreams = "=0.9.13"
 ZipFile = "=0.10.1"